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    Tester of Montana Becomes 2d Democratic Senator to Call on Biden to Step Aside

    Senator Jon Tester of Montana called on President Biden to drop his campaign for re-election on Thursday night, becoming the second sitting Democratic senator to publicly join the effort to push Mr. Biden out of the race. “I have worked with President Biden when it has made Montana stronger, and I’ve never been afraid to stand up to him when he is wrong,” Mr. Tester, a vulnerable incumbent whose opponent has sought to tie him tightly to Mr. Biden, said in a statement. “And while I appreciate his commitment to public service and our country, I believe President Biden should not seek re-election to another term.”Mr. Tester’s Washington office said he was also endorsing an open process to select the nominee at the Democratic National Convention, rather than throwing his support behind Vice President Kamala Harris.Mr. Tester is locked in a tight re-election race of his own, and he needs all the distance from Mr. Biden he can get in his deep-red state. Even before Mr. Biden’s poor debate performance last month put the spotlight back on his age and mental acuity, Mr. Tester had kept him at arm’s length while working to appear bipartisan and appeal to moderate and Republican voters. Mr. Tester is just the second Democratic senator to call on Mr. Biden to quit, though a group of House Democrats have done so and other senators have been said to be pushing Mr. Biden to the exits behind the scenes.Last month, when Mr. Tester debated Tim Sheehy, a former Navy SEAL and businessman who is his Republican rival for the Senate seat, he criticized the Biden administration’s energy policies and its approach toward immigration. “The bottom line is: He doesn’t listen to me enough,” Mr. Tester said of Mr. Biden. “He needs to.”But Mr. Sheehy has hammered at Mr. Tester, tying him to Mr. Biden and accusing him of being “the deciding vote for Biden’s America-Last agenda.” One of his recent advertisements played a clip of Mr. Tester vouching for Mr. Biden’s mental competency: “He’s absolutely 100 percent with it,” Mr. Tester says. Polls of the Montana Senate contest have shown a close race, with Mr. Sheehy often narrowly ahead.Mr. Sheehy immediately slammed Mr. Tester’s statement on Thursday night, which was reported by a local Montana news outlet moments before the senator released it publicly.“Is Jon Tester finally admitting he lied when he told us Biden is 100% with it?! And does this mean he’s endorsing his former colleague Kamala Harris??” Mr. Sheehy wrote on X. “Two-Faced Tester is desperately trying to distance himself from the train wreck he’s enabled and forced on Montanans.” More

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    How Biden Is Leveraging His Defiance to Try to Stem Democratic Defections

    President Biden’s increasingly emphatic declarations that he will not exit the presidential race are delivering an unmistakable message to potential wayward Democrats: Any criticisms going forward damage the party’s chances against Donald J. Trump.For days, Mr. Biden has said he will remain his party’s nominee after his poor debate short of an intervention from “the Lord Almighty.” On Monday, he put that assertion into action.It began with an open letter to congressional Democrats saying he was definitely running. It continued with a defiant call into one of his favorite cable news shows decrying the “elites” trying to shove him out. It included a midday appearance on a private video call with some of his campaign’s top financiers as well as a call into a virtual meeting on Monday evening with a bulwark of his past support: the Congressional Black Caucus.“I am not going anywhere,” Mr. Biden told the donors.The moves amounted to a show of defiance that the Biden operation hoped would earn him some deference, as uneasy Democratic lawmakers trickled back to Capitol Hill after a holiday break. At the same time, the Biden team was trying to reframe the pressure campaign to get him to step aside as one hatched by the elite party establishment rather than a genuine reflection of grass-roots voter fears about the 81-year-old commander in chief’s age and acuity.“I love this fighting Joe Biden,” said Representative Robert Garcia of California, a Democrat and an outspoken Biden supporter. “When he takes a punch, he’s going to come back and punch harder.”As lawmakers returned to Washington, Mr. Biden received some key words of support, including from Representative Alexandria Ocasio-Cortez of New York (“He is in this race; the matter is closed”), but also some concerns among influential lawmakers, including Senator Patty Murray of Washington, who is in the Democratic leadership (“We need to see a much more forceful and energetic candidate”).We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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    Tim Sheehy Wins G.O.P. Nod to Challenge Tester for Senate in Montana

    Tim Sheehy, a businessman and former Navy SEAL, won the Republican primary for U.S. Senate in Montana on Tuesday, according to The Associated Press, setting him up for a November showdown against Senator Jon Tester, the Democratic incumbent.With 27 percent of the vote counted, Mr. Sheehy had 75.5 percent, well ahead of his lesser-known opponents. Brad Johnson, Montana’s former secretary of state, had 18 percent of the vote, and Charles Walkingchild had 6.5 percent.The Republican primary was essentially a foregone conclusion since February, when Representative Matt Rosendale abruptly exited the race — less than a week after he entered it — citing former President Donald J. Trump’s endorsement of Mr. Sheehy. Mr. Rosendale, a right-wing hard-liner, had been viewed as the only serious challenger to Mr. Sheehy, for whom the Republican establishment had worked to clear the field. His victory is a boon for Republicans as they work to recapture control of the Senate, competing on a favorable map in which a number of vulnerable Democrats face tough re-election battles.“Tim Sheehy is a strong conservative, an American hero and a successful businessman who will bring an outsider’s perspective to a broken Washington,” said Senator Steve Daines, the Montana Republican who leads the National Republican Senatorial Committee, which works to elect Republicans to the Senate. “The clearest path to a Republican Senate majority runs through Montana.”Mr. Sheehy will face a formidable opponent in Mr. Tester, a popular incumbent who has survived past challenges in his ruby-red state by leaning on his background as a third-generation Montana farmer and his reputation of bipartisanship. Recent polls have suggested a tight race, and the nonpartisan Cook Political Report rates Montana a “tossup.” Mr. Tester officially captured the Democratic nomination on Tuesday.Mr. Tester has a cash advantage; he raised $4.1 million between April 1 and May 15, according to recent financial filings, and his campaign has $11.7 million cash on hand. Mr. Sheehy’s campaign raised $2.1 million in the same period — including $600,000 the candidate lent himself — and had $2.2 million cash on hand.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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    ‘Fix the Damn Roads’: How Democrats in Purple and Red States Win

    When Gov. Josh Shapiro of Pennsylvania got an emergency call about I-95 last June, his first thought turned to semantics. “When you say ‘collapse,’ do you really mean collapse?” he recalled wondering. Highways don’t typically do that, but then tractor-trailers don’t typically flip over and catch fire, which had happened on an elevated section of the road in Philadelphia.Shapiro’s second, third and fourth thoughts were that he and other government officials needed to do the fastest repair imaginable.“My job was: Every time someone said, ‘Give me a few days, and I’ll get back to you,’ to say, ‘OK, you’ve got 30 minutes,’” he told me recently. He knew how disruptive and costly the road’s closure would be and how frustrated Pennsylvanians would get.But he knew something else, too: that if you’re trying to impress a broad range of voters, including those who aren’t predisposed to like you, you’re best served not by joining the culture wars or indulging in political gamesmanship but by addressing tangible, measurable problems.In less than two weeks, the road reopened.Today, Shapiro enjoys approval ratings markedly higher than other Pennsylvania Democrats’ and President Biden’s. He belongs to an intriguing breed of enterprising Democratic governors who’ve had success where it’s by no means guaranteed, assembled a diverse coalition of supporters and are models of a winning approach for Democrats everywhere. Just look at the fact that when Shapiro was elected in 2022, it was with a much higher percentage of votes than Biden received from Pennsylvanians two years earlier. Shapiro won with support among rural voters that significantly exceeded other Democrats’ and with the backing of 14 percent of Donald Trump’s voters, according to a CNN exit poll that November.Biden’s fate this November, Democratic control of Congress and the party’s future beyond 2024 could turn, in part, on heeding Shapiro’s and like-minded Democratic leaders’ lessons about reclaiming the sorts of voters the party has lost.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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    Matt Rosendale to Run for Senate in Montana, Igniting Republican Fight

    As Republicans try to take down Senator Jon Tester, a Democrat, and win back control of the chamber, Representative Matt Rosendale is set to enter the race and start a primary clash.Representative Matt Rosendale of Montana is expected to announce a campaign for Senate as soon as this weekend, torching plans from top Republican officials to avoid a bruising primary battle in a state that many in the party view as their best chance to win back control of the chamber.Mr. Rosendale, an anti-abortion Republican agitator who voted to overturn the 2020 election, plans to formalize his campaign as Montana Republicans gather for their winter meetings this weekend in Helena, according to three people familiar with the deliberations who insisted on anonymity to discuss unannounced plans. A spokesman for Mr. Rosendale declined to comment.Awaiting the results of the Republican primary is Senator Jon Tester of Montana, a Democrat seeking his fourth term. Mr. Tester is a top target for Republicans given Montana’s deep-red political complexion: Former President Donald J. Trump won the state by more than 16 percentage points in 2020.More traditional Republican leaders in Washington are pushing the already-announced candidacy of Tim Sheehy, a wealthy businessman seen as a more palatable choice for moderate voters in the general election.Mr. Tester’s fellow Montanan in the Senate, Steve Daines, has tried to clear a path to the nomination for Mr. Sheehy from his role as chairman of the National Republican Senatorial Committee, the campaign arm for Senate Republicans.Mr. Daines has helped Mr. Sheehy secure a lengthy list of endorsements from Republican lawmakers across the party’s political spectrum, including Senator John Barrasso of Wyoming, who holds the No. 3 position in Senate Republican leadership, and Representative Marjorie Taylor Greene, the Trump superfan from Georgia.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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    With Manchin Out, Democrats’ Path to Holding the Senate Is Narrow

    While the party will be on defense in every competitive race, Republicans face some messy primaries and a recent history of nominating extreme candidates who have lost key contests.Senator Joe Manchin III said he decided to forgo re-election because he’d accomplished all his goals. But for the Democrats he’s leaving behind in Washington, the work to hold the party’s already slim Senate majority is just beginning.While there are no guarantees in politics, West Virginia is now a virtual lock to flip Republican. The state has become so conservative that only Wyoming delivered a wider Republican margin in the 2020 presidential race. In the immediate aftermath of Mr. Manchin’s announcement, several well-placed Democratic operatives said they couldn’t name a single West Virginian who could take his place on the ballot and be even remotely competitive, particularly if Gov. Jim Justice wins the Republican nomination.“This is a huge impact,” said Ward Baker, a former executive director for the National Republican Senatorial Committee, the group that oversees Senate races. “Manchin not running will save Republicans a ton of money — and it takes a seat off the board early.”The path to holding power was always going to be rocky for the Democrats’ current 51-seat majority, with or without Mr. Manchin.Two incumbents are running for re-election in red states, Montana and Ohio. A third senator, Kyrsten Sinema of Arizona, who was elected as a Democrat but has since switched her party affiliation to independent, has yet to declare her plans — leaving open the prospect of an unusually competitive three-way race. And the party must also defend four Senate seats in four of the most contested presidential battlegrounds: Wisconsin, Nevada, Pennsylvania and Michigan.But Republicans face some potentially divisive primaries and a recent history of nominating extreme candidates who have lost key contests.With West Virginia off the Senate chessboard next year, Democrats must win every race they are defending — and depend on President Biden to win the White House — in order to maintain a majority. In a 50-50 Senate, the vice president casts the tiebreaking vote. But that’s a risky bet considering a plurality of Americans haven’t approved of President Biden since August 2021, according to Gallup polls.The bad news for Senate Democrats is that they are on defense in each of the seven seats that both parties view as most competitive this year. The good news is that in five of those seven, the party has incumbents running for re-election, which has historically been a huge advantage.At least 83 percent of Senate incumbents have won re-election in 18 of the past 21 election cycles, according to OpenSecrets, a nonpartisan group that tracks money in politics. Last year, 100 percent of Senate incumbents were re-elected. “Given Democratic success in 2020 and 2022, it’d be malpractice to write Democrats off at this stage,” said Justin Goodman, a former top aide to Senator Chuck Schumer, the majority leader. “Candidates matter,” he said, as well as the ongoing contrast that Democrats have sought to strike against the “extreme MAGA agenda.”The Democratic incumbents in Montana and Ohio — the top two targets for Republicans with West Virginia off the map — are seeking re-election in states former President Donald J. Trump easily won twice. Both Senator Jon Tester of Montana and Senator Sherrod Brown of Ohio have exceeded expectations before, but never with such an unpopular presidential candidate at the top of the ticket. And unlike most incumbents, whose victories tend to become easier over time, Mr. Tester has always had close races. Mr. Brown’s margins have narrowed.But close victories count just as much as easy ones, and Democrats maintain that the personal brands of both Mr. Brown and Mr. Tester matter more in their states than national political winds.Republicans, who are also facing headwinds because of the unpopularity of Mr. Trump and the party’s role in rolling back abortion rights, are attempting to follow suit. The National Republican Senatorial Committee is putting a heavy emphasis on candidate recruitment this cycle to find contenders who can appeal to both conservatives and moderates in the party.The strategy has already paid off in West Virginia.One of the first calls this year from Senator Steve Daines, a Montana Republican overseeing his party’s Senate races, was to Mr. Justice in West Virginia, believing that the popular governor’s presence in the race would help persuade Mr. Manchin to retire.The second part of Mr. Daines’s strategy in West Virginia was persistently lobbying to secure a Trump endorsement for Mr. Justice, with the aim of not just forcing out Mr. Manchin but also the hope that it would convince him to run for president as an independent. Mr. Trump endorsed Mr. Justice last month.Mr. Manchin, meanwhile, furthered speculation of a potential presidential bid by saying Thursday he planned to gauge “interest in creating a movement to mobilize the middle and bring Americans together.”In 2018, Democrats and Republicans combined spent about $53 million on the West Virginia Senate race. With no competitive race there in 2024, both parties will have tens of millions of dollars to spend on a second tier of battleground races. Last year, candidates, parties and outside groups spent more than $1.3 billion on 36 Senate races, including $737 million in just five states — Arizona, Nevada, Ohio, Pennsylvania, and Wisconsin — that are also on the ballot again next year.“I think Wisconsin and Michigan are about to get a bunch of Republican money they weren’t going to get otherwise,” said Brad Todd, a Republican strategist who has worked on Senate races.The most interesting of the second-tier races may be in Arizona, where the state may have a competitive three-way race — a rarity in American politics. The wild-card is Ms. Sinema.If she runs for a second term, she will most likely face Representative Ruben Gallego, a well-liked progressive Democrat who has already spent $6.2 million on the race this year, and Kari Lake, the firebrand conservative Republican and one of her party’s best-known election deniers who is favored in her party’s primary.A competitive three-way general election would add a riveting dynamic to what could be the most expensive Senate race in the country next year. The state’s Senate contest last year, which pitted Senator Mark Kelly against Blake Masters, the Republican nominee, cost more than $225 million.There is no top-flight Republican challenging Senator Tammy Baldwin in Wisconsin, but the party has been pushing for Eric Hovde, a businessman who ran for Senate in 2012. In Pennsylvania, Republicans have cleared a path for David McCormick with the aim of avoiding a bruising primary and strengthening their bid against Senator Bob Casey, who is seeking a fourth six-year term.Republicans haven’t been as lucky in Michigan or Nevada.In Michigan — the only competitive Senate race without an incumbent — Democrats so far have mostly aligned behind Representative Elissa Slotkin, a former C.I.A. analyst who represents a divided district. Mr. Daines recruited former Representative Mike Rogers, who was chairman of the House Intelligence Committee. But James Craig, a former Detroit police chief, and former Representative Peter Meijer, who lost his seat after voting to impeach Mr. Trump, have also entered the Republican race.The Republican establishment pick in Nevada is Sam Brown, a retired Army captain who lost a Senate primary last year. But he’s facing a primary against Jim Marchant, a Trump loyalist and election denier who lost a race for secretary of state last year. The winner would take on Senator Jacky Rosen, a Democrat who is seeking her second term.With West Virginia scotched, the Democratic Senate map is undeniably constricting. But the party will look to go on the offensive in Florida and Texas. Both states have been reliable Republican strongholds in recent years, but Democrats realistically have no better options to flip a Republican seat this year.In Florida, Senator Rick Scott, the state’s former governor, is seeking a second term. He’s never won an election by more than 1.2 percentage points, and he’s also never run in a presidential election year — when Democrats typically fare better in Florida.But the state lurched to the right last year when Republicans won five statewide races on the ballot by an average of 18.9 percentage points. The leading Democratic challenger in the Florida Senate race this year is former Representative Debbie Mucarsel-Powell, who was unseated from her Miami-based seat after one term.In Texas, Senator Ted Cruz has been a constant target for Democrats — and survived each time. This year, his top challenger appears to be Representative Colin Allred, a Dallas-area Democrat who defeated an incumbent Republican in 2018.“Cruz’s vulnerability means there’s an opportunity there, and Cruz can be beat no matter the presidential result,” said J.B. Poersch, president of the Senate Majority PAC, which has spent more than $140 million in the past four years supporting Democratic Senate candidates.The Democratic Senatorial Campaign Committee has been testing campaign messages in both states, and the party has dedicated communications and research staff in each location.But to win in Florida and Texas, Democrats will need stars to align in a way they did not in West Virginia.“Quite possibly the stupidest thing I’ve ever heard,” Mr. Baker, the former N.R.S.C. director, said of Democratic hopes to take Florida or Texas. “They just lost a Senate seat. No way to spin that.” More

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    Senate Democrats Outpace Republicans in Fund-Raising in Key States

    The 2024 election map is a challenging one for Democrats — especially in states they need to hold for a majority. But the incumbents made a strong financial showing this quarter.Senate Democrats staring down tough re-election fights can look to one bright spot: sizable fund-raising hauls and cash stockpiles more than a year before Election Day.In states where they are most vulnerable in 2024 — Montana, Ohio, Pennsylvania, West Virginia and Wisconsin — Democratic incumbents have raised more money than they previously have at this stage in earlier cycles, the latest campaign filings show. Saturday was the deadline for campaigns to file spending and fund-raising reports for the three months between April 1 and June 30.Most of the vulnerable incumbent Democratic senators also topped their prospective Republican challengers in fund-raising and will head into the fall with several million dollars in cash on hand.The race for Senate control is in its earliest months, and Republicans are still building campaigns. Yet the Democrats’ relative financial strength in the second quarter of an off year suggests significant energy as the party aims to protect its slim majority next year.The electoral map, however, will be one of the most challenging the party has faced in years. Nearly two dozen Democratic seats are up for re-election in 2024, with eight incumbents seen as vulnerable, while just 10 Republicans face re-election — and all of the G.O.P. incumbents won by comfortable margins in previous cycles.In their Senate re-election bids, Sherrod Brown of Ohio and Jon Tester of Montana both brought in more than $5 million. Mr. Brown had $8.7 million in cash on hand, and Mr. Tester $10.5 million. Senator Tammy Baldwin of Wisconsin raised $3.2 million, the most ever raised in a Wisconsin Senate contest in an off year, according to her campaign.Senator Joe Manchin of West Virginia, a conservative Democrat who has not yet publicly said whether he will run for re-election — and is flirting with a third-party presidential run — raised $1.3 million over the last three months and has more than $10 million in the bank, expanding his cash advantage over Gov. Jim Justice and Representative Alex Mooney, Republicans who have already begun campaigns to unseat him.In Pennsylvania, Senator Bob Casey posted his best fund-raising quarter to date, bringing in more than $4 million for his re-election bid.Republicans have been preparing their own money machines and recruiting candidates in five states with vulnerable Democrats. Republican confidence has also been bolstered by the 2024 Senate map.The Democrats “are trying to use money to defy gravity,” said Stu Sandler, a political consultant and former political director of the National Republican Senatorial Committee. “This is a lopsided map for them,” he added, pointing to former President Donald J. Trump’s 2020 victories in Ohio, Montana and West Virginia — all states Mr. Trump won decisively. And, he said, Republicans have some “very credible favorites” to challenge the incumbents.Democrats view this fund-raising as a crucial show of strength that will fortify their candidates ahead of a difficult 2024 cycle for the party.“Voters and grass-roots supporters are once again supporting battle-tested Senate Democratic candidates in record ways because they recognize the stakes of this election and the importance of stopping Republicans from implementing their toxic agenda,” said Tommy Garcia, spokesman for the Democratic Senatorial Campaign Committee.In Arizona, Representative Ruben Gallego raised more than Senator Kyrsten Sinema, who has changed her party affiliation from Democrat to independent, by two-to-one — the second time this year Mr. Gallego has notched such a ratio. He still trails Ms. Sinema in cash on hand by more than $7 million. Ms. Sinema has not yet announced whether she will run for re-election.Even Democrats in safe Republican territory had strong showings. In Texas, Representative Colin Allred raised $6.2 million in his challenge to Senator Ted Cruz. Mr. Allred, who announced his campaign in May, brought in more money in a shorter period of time than Mr. Cruz, who raised $4.4 million in the last three months. More

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    Facing Tough Senate Race, Montana G.O.P. Looks to Change the Rules

    An election bill moving through the Republican-led Legislature would rewrite the rules for a single race: the looming battle against Senator Jon Tester, a Democrat.HELENA, Mont. — Republicans typically cry foul when accused of rewriting election laws to benefit their candidates. But as the Montana Legislature debates a new voting bill, even some G.O.P. lawmakers concede that this one appears designed to help them win elections — more precisely, one very important election.The bill would rewrite the rules for the state’s next U.S. Senate race and only that race. The 2024 fight to oust Senator Jon Tester, a Democrat, is expected to be one of the tightest in the country.The legislation would shift the contest from a traditional election into a “top two” primary system, making it exceedingly difficult for third parties to reach a general election ballot. Some believe the system would keep the state’s vibrant Libertarian Party from siphoning votes from the Republican nominee.The 2024 fight to oust Jon Tester, a Democratic senator from Montana, is expected to be one of the tightest in the country.Sarah Silbiger/ReutersWhile supporters of the bill say it makes elections fairer, both Republican and Democratic lawmakers in Helena have claimed that the bill reeks of political interference. Some have chafed at the involvement of Washington operatives, especially allies of Senator Steve Daines. A Montana Republican and head of the National Republican Senatorial Committee, Mr. Daines is leading the party’s campaign to win control of the Senate in 2024.Brad Molnar, a Republican state senator who opposes the bill, criticized Washington meddling in Montana politics, saying that if national Republicans get involved, “we will lose.” He predicted that the bill would backfire on Republicans if angry Libertarians flock to Democrats. “They will be angry. Why wouldn’t they be? I’m not a libertarian, and I’m angry.”The bill’s sponsor, State Senator Greg Hertz, said he was trying to ensure that Montana’s senator would win with more than 50 percent of the vote and to also tamp down on parties’ interference with third-party candidates.Mr. Hertz said he had designed the bill to apply only to the upcoming Senate race because he saw it as a test run. He expected the Legislature to examine expanding the system to congressional, state legislative and other statewide races in the future.The system would mirror California’s primaries, where all the candidates from all the parties appear on the same ballot, and the top two vote-getters face off in the general election.The bill passed the Montana Senate last week by a narrow margin, with seven Republican senators voting against it. A House committee will hold a hearing on the bill on Friday.State Senator Greg Hertz, the bill’s sponsor, says he was trying to tamp down on parties’ interference with third-party candidates.Janie Osborne for The New York TimesMultiple former Republican officials are expected to testify against it. The Libertarian Party has also been organizing opposition to the bill. The state’s Republican governor has not weighed in.But the forces crafting the bill and pushing it through are powerful.Chuck Denowh, a lobbyist who worked for Mr. Daines’s 2020 campaign and has ties to the Montana Republican Party, has been working closely with Mr. Hertz. At one point he suggested critical changes that focused the bill on Mr. Tester’s race, according to emails reviewed by The New York Times.“We would like it to apply only to United States Senate races,” Mr. Denowh said in an email sent on March 26 to multiple lawmakers, including Mr. Hertz. “We’d like a sunset in 2025,” he added. It was not clear whom “we” was referring to, and Mr. Denowh declined to answer questions.Mr. Hertz quickly agreed with the changes and asked State Senator Steven J. Fitzpatrick, the House majority leader, who was copied on the email chain, to make the newly reworked proposal “a priority bill.”The sudden changes and swift reintroduction after an initial failure in committee caught Republican lawmakers by surprise.In a text message chain among eight Republican senators, Mr. Fitzpatrick answered lawmakers’ concerns by telling them the bill “came from Daines” and that it was the “brainchild of the Jason Thielman,” according to screenshots of the texts obtained by The New York Times. Mr. Thielman is a longtime Daines aide who is now the executive director of the N.R.S.C.“No wonder I don’t like it,” responded Senator Dan Salomon, a Republican state senator who voted against the bill.When asked about the text messages, Mr. Fitzpatrick said that he had never spoken directly with Mr. Daines about the bill, but that he believed the effort originated with national Republicans.Mr. Daines has not weighed in publicly. Rachel Dumke, a spokeswoman for Mr. Daines’s office, declined to comment.At least two Republican lawmakers in Montana said they had been pressured by Mr. Daines’s office to support the bill. And one Republican state senator received a text message from state Republican Party officials explicitly saying the bill was needed to defeat Mr. Tester. The lawmakers asked for anonymity to disclose private discussions.In an interview, Mr. Hertz said he had been working on election issues since last September, initially exploring adding a runoff election. But he acknowledged that his efforts seemed to gain national interest when he zeroed in on the Senate race.“Yeah, I heard from a lot of people in D.C. at that point in time,” Mr. Hertz said. He added that he hadn’t spoken with Mr. Daines personally but had spoken with Mr. Thielman repeatedly about the status of the bill.A spokesman for the N.R.S.C., Mike Berg, declined to comment on Mr. Thielman’s involvement.“The optics of the situation, I felt, were bad … I want to do it across the board,” said Jason Small, a Republican state senator who voted against the bill.Janie Osborne for The New York TimesMr. Hertz said that he thought the changes would help third parties. “This gives them an opportunity in the primary to win more votes. And if you have enough support, you will end up on the general ballot, and that will give you an opportunity to make your case to the voters of Montana.”A spokeswoman for Gov. Greg Gianforte declined to respond to questions, pointing to the governor’s brief statement at a news conference on Thursday.“A number of other states have tried things like this,” Mr. Gianforte said. “I think it’s kind of an interesting idea, but we won’t take a firm position until we actually see the final legislation.”Some Republican lawmakers who were supportive of the idea of a top-two election system balked when they saw that the proposal had been amended to apply only to the 2024 Senate election.“If we’re going to do a top-two primary, I’m all for it. I think it’s wonderful,” said Jason Small, a Republican state senator who voted against the bill. “The optics of the situation, I felt, were bad if we’re going to just single out one particular race and try it there. I want to do it across the board.”Some Republicans in the statehouse noted that the bill might not have much of an impact on the outcome. They cited a recent study by the election website FiveThirtyEight that found that Mr. Tester was likely to have prevailed in all of his elections even if the Libertarian candidate hadn’t run.The Tester campaign accused Montana Republicans of attempting a power grab.Republicans are “trying to change local election laws to look more like California’s in an attempt to gain political power for themselves,” said Shelbi Dantic, a spokeswoman for Mr. Tester’s re-election campaign.So far, no front-runner has emerged to challenge Mr. Tester in November. Republicans in Helena expect Representative Matt Rosendale, a conservative who voted to overturn the 2020 presidential election, to explore a run. Tim Sheehy, a wealthy businessman and military veteran, is being recruited by some Republicans in Washington to run, as first reported by Axios, though he has not made any formal announcement.As news about the bill spread around the state, Republican lawmakers said they were receiving calls and texts from constituents claiming an unease with the bill. Senator Jeff Welborn, a Republican state senator, noted that the complaints weren’t coming from just Democrats.Mr. Welborn said that he had received multiple text messages, including one from a constituent who said the bill amounted to election interference. “This guy also has Republican candidate signs in his yard,” Mr. Welborn said. “He saw this as a really, really bad look on Montana as a state for trying this one on.”Former Republican leaders in the state have also been vocal in their opposition.“It’s a horrible commentary about how you value the votes of your fellow citizens,” said Marc Racicot, a former Republican governor and former chair of the R.N.C. “They didn’t sign up as guinea pigs.”Republicans in favor of the bill said that they believed it would cut down on the interference by major parties with third-party candidates. In the past, Democrats have attempted to promote Libertarian candidates to try and divert votes from Republicans, and Republicans have fought to get Green Party candidates on the ballot to try and draw support away from Democrats.“I think at least with the top-two primary you eliminate some of that nonsense,” Mr. Fitzpatrick said, adding, “It’s dirty politics at its worst.” More