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    Jim Marchant, a Nevada Election Denier, Announces Senate Run

    Mr. Marchant, who lost his bid for Nevada’s secretary of state last year, will now attempt to unseat Senator Jacky Rosen, the Democratic incumbent.Jim Marchant, a vocal election denier and Trump ally who lost his bid for Nevada’s secretary of state in last year’s midterm elections, declared his candidacy on Tuesday for the Senate in a swing state contest that could decide control of the chamber in 2024.Mr. Marchant, a Republican, is seeking to challenge Senator Jacky Rosen, a moderate Democrat who is in her first term. No other high-profile Republicans have entered the contest so far.During last year’s midterm elections, Mr. Marchant helped organize a national “America First” slate of secretary of state candidates, a group of right-wing election deniers whose campaigns centered on re-litigating baseless voter fraud claims. All but one of the candidates were rejected by voters.The once-obscure election oversight post has taken on heightened significance since the 2020 election. In Mr. Marchant’s race, he did not appear to concede.Mr. Marchant, 66, a former one-term assemblyman, was also part of Nevada’s alternate slate of pro-Trump electors who sought to overturn Joseph R. Biden Jr.’s victory in the state in 2020. He refused to accept the results that same year in his race for Congress, unsuccessfully challenging them in court.“There’s nothing more precious than our freedom and personal liberty,” Mr. Marchant said on Tuesday, speaking at a Las Vegas church known for having tested Nevada’s pandemic stay-at-home orders in court in 2020. “And I’m running for United States Senate to protect Nevadans from the overbearing government, from Silicon Valley, from big media, from labor unions, from the radical gender change advocates, where Jacky Rosen has failed you.”In a statement on Twitter on Tuesday, Ms. Rosen cast Mr. Marchant as an extremist.“Nevadans deserve a Senator who will fight for them, not a MAGA election denier who opposes abortion rights even in cases of rape and incest,” she wrote. “While far-right politicians like Jim Marchant spread baseless conspiracy theories, I’ve always focused on solving problems for Nevadans.”Mr. Marchant was joined on Tuesday by the political strategist Dick Morris, who Mr. Marchant said would be working as a general consultant on his campaign. Mr. Morris, who preceded him onstage, also repeated false claims about election fraud. More

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    Senator Ben Cardin Won’t Seek Re-election in Maryland

    His retirement is likely to draw a number of Democrats and Republicans to compete for the seat.Senator Ben Cardin of Maryland, a long-serving Democrat, announced his retirement on Monday, clearing the way for highly competitive primaries to replace him in 2024, especially among Democrats in a deep-blue state.Maryland’s liberal-leaning voters have not sent a Republican to the U.S. Senate since 1980, and the eight-member congressional delegation includes just one member of the G.O.P.“I have run my last election and will not be on the ballot in 2024, but there is still much work to be done,” Mr. Cardin, 79, said in a statement. “During the next two years, I will continue to travel around the state, listening to Marylanders and responding to their needs.”High-profile Maryland Democrats who could be in the mix to replace Mr. Cardin include Representatives Jamie Raskin and David Trone, and Angela Alsobrooks, the executive of Prince George’s County.On the Republican side, there is already speculation about whether Larry Hogan, a popular former governor who in March said he would not run for president, will make a bid.In an interview, Mr. Cardin declined to endorse a successor, but he said he was confident Democrats would hold the seat. His election to the Senate in 2006 made him the third straight representative from Maryland’s Third Congressional District to join the chamber. The House seat is now held by John Sarbanes, a son of Paul Sarbanes, the senator who preceded Mr. Cardin.Mr. Cardin was named last month by Senator Chuck Schumer, the majority leader, to serve on the Judiciary Committee as a temporary replacement for Senator Dianne Feinstein of California, who is on leave recovering from shingles, but Republicans have blocked the move. Without her vote, Democrats have been unable to advance stalled judicial nominations.In a video announcing his retirement that he recorded with his wife, Myrna Cardin, Mr. Cardin touched on highlights of a career that includes enacting the Magnitsky sanctions, international penalties aimed at violators of human rights, and environmental protections for Chesapeake Bay.Much of his motivation through his 58 years in elected office, Mr. Cardin said in the video, “comes back to tzedakah, part of our tradition as Jews to help those that are less fortunate.”Mr. Cardin, who was speaker of the Maryland House of Delegates before being elected to Congress, said in the interview on Monday that he hopes to focus his final two years in the Senate on helping small businesses. More

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    Daines Endorsement Reflects Uneasy Senate G.O.P. Alliance With Trump

    Senate Republicans, even those who have broken with the former president, say their campaign chief’s decision to back him could boost their push for the majority.WASHINGTON — When Senator Steve Daines, the leader of the Senate Republican campaign arm, quietly informed Senator Mitch McConnell, the minority leader, that he intended to endorse former President Donald J. Trump, Mr. McConnell was fine with the idea.Mr. McConnell, the Kentucky Republican, is not on speaking terms with the former president, having abruptly turned against him after the Jan. 6, 2021, attack on the Capitol. Mr. Trump has publicly savaged the senator and repeatedly demeaned his wife with racist statements.But the minority leader, according to a person familiar with his thinking, believed that somebody in the Senate G.O.P. leadership ranks should have a working relationship with the party’s leading presidential contender — and it might as well be the man charged with winning back the Senate majority.Mr. Daines’s endorsement of Mr. Trump this week — and Mr. McConnell’s private blessing of it — highlighted how top Senate Republicans have quietly decided to join forces with their party’s leading presidential candidate, putting aside the toxic relationship that some of them have with him to focus on what they hope will be a mutually advantageous political union.Mr. Daines of Montana, the chairman of the National Republican Senatorial Committee, is the first and so far only member of the Senate G.O.P. leadership team to endorse Mr. Trump. Mr. McConnell, who enabled Mr. Trump and his agenda during much of his presidency before the Capitol riot, has not spoken to the former president since December 2020. His No. 2, Senator John Thune of South Dakota, also has been mercilessly attacked by Mr. Trump.Mr. Thune portrayed Mr. Daines’s embrace of the former president as the cost of doing business — what’s necessary to win.“He’s got a tough job to do,” Mr. Thune told reporters at the Capitol. “He’s got a lot of races around the country that we need to win. And I think he wants as many allies as possible.”Asked about the fact that Mr. Daines has endorsed someone who has attacked both him and Mr. McConnell, the senator was temporarily at a loss for words.“Well,” Mr. Thune said with a pause, “what can I tell you?”Many Senate Republicans, in contrast to their counterparts in the House, view Mr. Trump as a political anchor who cost them the majority in 2020 with baseless claims of voter fraud in Georgia that damaged their runoff chances. Many believe Mr. Trump cost them again in 2022 by endorsing Senate contenders who struggled in the general election. Mr. McConnell has attributed his party’s inability to win the Senate to “candidate quality” problems spurred by Mr. Trump’s primary endorsements.Steven Cheung, a spokesman for Mr. Trump, said that there was “tremendous support nationally and statewide” for the former president, when asked about Senate Republican leaders’ reluctant acceptance of Mr. Daines’s endorsement.“By contrast, DeSantis has embarrassingly tiny support,” Mr. Cheung said.Some Republicans are determined to steer clear of Mr. Trump. Senator Mitt Romney of Utah, a vocal critic of Mr. Trump’s who voted to convict the former president in both of his impeachment trials, insisted that Mr. Daines’s backing for Mr. Trump should not be regarded as an embrace of the former president by the Senate G.O.P.“Montana is a big Trump-supporting state,” Mr. Romney said on Wednesday. “I don’t think he did that as the leader of the Republican team. Mitch McConnell is our leader, and I doubt he’ll endorse anybody.”A spokesman for Mr. Daines declined to comment on Mr. Romney’s characterization of the endorsement.Some wondered whether Mr. Daines was deliberately defying Mr. McConnell like the last chairman of the party campaign arm, Senator Rick Scott of Florida, did during last year’s midterm elections.“I was surprised,” Senator Joni Ernst of Iowa, another member of the party leadership, said this week when asked what she thought of the Daines endorsement. “But all of the senators have the opportunity to endorse who they want to endorse.”In fact, Mr. Daines and Mr. McConnell are on the same page.Mr. Trump’s endorsement highlighted how Senate Republicans shows an uneasy alliance among estranged political players.Dave Sanders for The New York TimesMr. Daines gave Mr. McConnell a heads up that he would be endorsing Mr. Trump ahead of a Monday night appearance on the podcast of Donald Trump Jr., the former president’s eldest son, according to the person familiar with his thinking.Mr. McConnell views Montana, West Virginia and Ohio — which Mr. Trump won by big margins — as among the most important Senate battlegrounds in 2024, and it will fall to Mr. Daines to keep the former president on friendly terms with the party’s favored candidates, especially in the states where he remains wildly popular.While the rest of Mr. McConnell’s team keeps their distance from the former president, Mr. Daines speaks frequently with Mr. Trump, including as recently as Wednesday night, said a person with direct knowledge of the call who was not authorized to discuss it publicly.So even after Mr. Trump has denigrated Mr. McConnell’s wife, Elaine Chao, the Senate minority leader has engaged in a familiar game with the former president, with whom he worked closely to cut taxes and stack the federal judiciary with ardent conservatives.Mr. McConnell has said as little as possible about the former president since cutting off all contact with him. He has ignored Mr. Trump’s attacks against him and his wife, and he has refused to follow the approach of former Representative Liz Cheney, Republican of Wyoming, who has said she plans to do whatever she can to stop Mr. Trump from becoming president again.Instead, Mr. McConnell has said he is focused on winning back the Senate, and in service of that goal he is already making accommodations for the former president. He has said he will support Mr. Trump if he wins the 2024 Republican nomination.Like many of his colleagues, Senator John Cornyn of Texas, a former chairman of the Republican campaign arm himself, is staying out of Mr. Trump’s way. He said he did not plan to endorse in the primary, but “will support the nominee” in the general election.Mr. Daines, he said, was “entitled to some latitude given the complexity of the political environment that we’re entering into.”Republicans’ goal, Mr. Cornyn added, was to win back the majority.“And I don’t really care what the tactics are,” he said. More

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    Gov. Jim Justice Is Expected to Announce Senate Run for Joe Manchin’s Seat

    Mr. Manchin is viewed as one of the most vulnerable Democrats in next year’s elections, in a state, West Virginia, that has overwhelmingly trended red.Gov. Jim Justice of West Virginia is set to announce a Senate campaign on Thursday, giving Republicans a strong recruit against Senator Joe Manchin III, one of the most vulnerable Democrats up for re-election in 2024.The West Virginia race is one of the most essential pickup opportunities for Republicans if they are to retake control of the Senate, which Democrats hold by a narrow 51-49 seat margin.Mr. Manchin, who represents by far the most Republican state held by any Democratic senator, has yet to announce whether he will seek re-election, but Republicans are hoping that Mr. Justice’s entry might spur him toward retirement.Mr. Manchin in recent years has been one of the few Democrats who can compete in the overwhelmingly Republican state.Mr. Justice’s team teased a “special announcement” at 5 p.m. Eastern time on Thursday at the Greenbrier Resort in White Sulphur Springs, W.Va. It made a point to note that his English bulldog — Babydog, known for a memorable appearance last year at Mr. Justice’s State of the State speech — would be present for the announcement.The advisory did not specify the nature of the announcement, though it offered a livestream link to a YouTube page with the description “The official YouTube channel for Jim Justice for U.S. Senate, Inc.” Two people with knowledge of Mr. Justice’s plans confirmed he would be entering the Senate race.Before facing Mr. Manchin, Mr. Justice would need to make it through a Republican primary. He will have at least one major opponent, Representative Alex Mooney, who has been closely allied with former President Donald J. Trump.Mr. Mooney has already attacked Mr. Justice as a “RINO,” or “Republican in name only,” one of Mr. Trump’s and his allies’ favorite insults.Mr. Mooney has the backing of the Club for Growth, the influential conservative group that has spent heavily in recent Republican primaries, and Senator Ted Cruz, Republican of Texas, endorsed him last week.Mr. Justice, a billionaire businessman, was first elected governor in 2016 and re-elected in 2020, making him term-limited next year. He initially ran and won as a Democrat, but switched his party affiliation to Republican in 2017, less than a year into his first term.He made that announcement at a rally alongside Mr. Trump, saying, “Today I will tell you as West Virginians that I can’t help you anymore being a Democrat governor.” As is traditional for politicians who switch allegiances, he said his former party had moved away from him, not the other way around.Top Senate Republicans have been eager to lure Mr. Justice into the race. One Nation, a nonprofit group aligned with Senator Mitch McConnell, the Republican leader, recently began a $1 million ad campaign against Mr. Manchin for his support of President Biden’s Inflation Reduction Act.Mr. Manchin appeared on Fox News this week, in an interview with Sean Hannity, and attacked the Biden administration for the way it had implemented the legislation. He even threatened to vote to repeal it over its climate provisions.Mr. Hannity asked why Mr. Manchin had remained with the Democratic Party.“Well, they don’t always get my vote, you know that — if I can’t go home and explain, I don’t vote for it,” Mr. Manchin said. “I think about that every day: Why am I a Democrat?”Shane Goldmacher More

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    Abortion Surges to the Center of the 2024 Campaign

    Nearly a year after the Supreme Court turned abortion into a dominant issue of the 2022 midterms, the battle over abortion rights has catapulted to the center of the emerging 2024 election season, igniting Democrats, dividing Republicans and turbocharging sensitive debates over health care.From North Carolina to Nevada, Democrats running at every level of government are vowing to make support for abortion rights a pillar of their campaigns, and to paint their opponents as extremists on the issue.And as races intensify, Republicans are caught between the demands of their socially conservative base and a broader American public that generally supports abortion rights, exposing one of the party’s biggest political liabilities as it tries to win back the White House, recapture the Senate and expand its narrow House majority.This month, a Wisconsin judge won a crucial State Supreme Court race after running on her support for abortion rights.Jamie Kelter Davis for The New York TimesAll of those dynamics have crystallized over the last month. First, a liberal Wisconsin judge won a crucial State Supreme Court race by a commanding margin after running assertively on her support for abortion rights. A few days later, a conservative judge in Texas took the extraordinary step of moving to invalidate the Food and Drug Administration’s approval of the abortion pill mifepristone. The Supreme Court on Friday said the pill would remain widely available for now, halting two separate rulings, including the Texas ruling, while an appeal moves forward.Democrats cast the Supreme Court’s order as a close call, and warned that many Republicans still want as many abortion restrictions as possible, including a national ban. At the same time, Republican presidential hopefuls — whose teams generally did not respond to requests for comment on the Supreme Court’s ruling on Friday night — are straining to find their footing on the issue.Gov. Ron DeSantis of Florida recently signed a ban on abortion after six weeks of pregnancy, when many women do not know they are pregnant, staking out a position that conservatives applauded, but one that could hurt him in a general election with moderate voters. Others, like Senator Tim Scott of South Carolina, have struggled to articulate firm positions. And former President Donald J. Trump, whose choices for the Supreme Court helped overturn Roe v. Wade, recently angered anti-abortion leaders by emphasizing state power over the issue rather than a national ban.“I’m worried that we let the Democrats use the issue to define us, because we aren’t very good at our own messaging,” said the Republican governor of New Hampshire, Chris Sununu, who signed a measure that banned abortions after 24 weeks, with some exceptions. Mr. Sununu, who calls himself “pro-choice,” was the rare possible Republican presidential candidate to offer a comment on the court’s ruling on Friday: “Good call by the Supreme Court.”Representative Suzan DelBene, a Washington Democrat who leads the House Democratic campaign arm, said Republicans had moved in an increasingly “extreme” direction on abortion. She pointed, for instance, to an Idaho law criminalizing those who help a minor get an out-of-state abortion without parental permission, and to threats more broadly to abortion medication.“It’s dangerous, and people are angry,” she said. “We’re going to see that in 2024 in elections across the country.”Anti-abortion demonstrators gathered in front of the Supreme Court as part of the 50th March for Life in Washington in January. Haiyun Jiang/The New York TimesAs President Biden moves toward announcing a re-election bid as soon as Tuesday, one of his advisers predicted that the issue of abortion rights would be more significant in 2024 than it was last year, as Americans experience the far-reaching results of overturning Roe.Democrats are carefully monitoring — and eagerly broadcasting — the positions on abortion taken by Republicans in the nascent stages of primary season. And they are pressing their own succinct message.“We support women making decisions regarding their health care,” said Senator Gary Peters, a Michigan Democrat who leads the Democratic Senate campaign arm. “Not politicians, not judges.”Republicans are far more divided on what their pitch should be — and party officials acknowledge this poses a steep challenge.“We support women making decisions regarding their health care,” said Senator Gary Peters, a Michigan Democrat. “Not politicians, not judges.”Julia Nikhinson for The New York TimesConflict always emerges between the demands of primary voters and the preferences of general-election swing voters. But the overturning of Roe has drastically complicated this calculus for Republican candidates. They now face detailed questions about whether to support national bans; how soon into a pregnancy abortion bans should apply; what exceptions, if any, to permit; and how they view medication used in instances of abortions and miscarriages.“We wrap ourselves around the axle trying to nuance our position as a candidate or a party through the primary, knowing that we’re going to have to reexplain ourselves in the general,” Mr. Sununu said. “It comes off as disingenuous, convoluted, and at the end of the day, it really chases away voters.”The fault lines in the party were illuminated again this past week. After a spokesman for Mr. Trump indicated to The Washington Post that the former president believed abortion should be decided at the state level, the anti-abortion group Susan B. Anthony Pro-Life America issued a stern rebuke.Gov. Ron DeSantis of Florida signing a 15-week abortion ban into law in April 2022. This month, he signed a more restrictive six-week ban.Paul Hennessy/SOPA Images, via Sipa USA“We will oppose any presidential candidate who refuses to embrace at a minimum a 15-week national standard to stop painful late-term abortions while allowing states to enact further protections,” Marjorie Dannenfelser, the president of the organization, said in a statement.In a separate statement, Mr. Trump’s campaign said he “believes it is in the states where the greatest advances can now take place to protect the unborn,” while declaring him the “most pro-life president in American history.”There will be no shortage of opportunities for Republican candidates to highlight their anti-abortion credentials and to navigate the fallout from the Supreme Court’s decision, starting as soon as Saturday, at a gathering of the Iowa Faith and Freedom Coalition. On Tuesday, Nikki Haley, the former United Nations ambassador, is also expected to give a speech on abortion.Bob Vander Plaats, a socially conservative leader in Iowa whose organization is expected to host a gathering with presidential candidates this summer, said, “There’s a lot of ways to determine a person’s bona fides when it comes to the sanctity of human life, but I guarantee you the Texas ruling will be discussed.”The issue of abortion, he said, “will be a cornerstone issue in the Iowa caucuses. It will be a cornerstone issue in the Republican primary.”On Thursday, Ronna McDaniel, the chair of the Republican National Committee, tried to help her candidates navigate the subject, suggesting that opposing abortion after 15 weeks of pregnancy was a strong position politically, somewhat mirroring polling she has been showing to members of her party.“In 2022, a lot of Republican candidates took their D.C. consultants’ bad advice to ignore the subject,” she said in a speech. Noting the onslaught of Democratic ads on the subject, she said, “most Republicans had no response.”She urged Republicans to cast Democrats as “extreme” on the issue, a message echoed by some working on House and Senate races who say Democrats should be pressed on what limitations they support.Nicole McCleskey, a Republican pollster who worked for the successful re-election campaign of Gov. Kim Reynolds of Iowa last year, pointed to Ms. Reynolds, Gov. Mike DeWine of Ohio and Gov. Brian Kemp of Georgia as examples of leaders who embraced tight abortion restrictions but were not defined by that issue alone. All three swept to comfortable victories in states that often lean right, but are not the nation’s most conservative states.“This last election saw some candidates who were unclear or changed their position, lacked conviction and were unprepared to talk about this issue,” she said. “If you have those things — if you have conviction, if you have empathy, if you are prepared and you know how to define yourself and your opposition,” she added, “we can successfully navigate this issue.”But some candidates have shown little interest in managing a rhetorical balancing act.The issue is likely to come to a head in North Carolina, home to what may be the most consequential governor’s race of 2024, with Gov. Roy Cooper, a Democrat, term-limited.“I’m worried that we let the Democrats use the issue to define us, because we aren’t very good at our own messaging,” said Gov. Chris Sununu of New Hampshire, a Republican. Sophie Park for The New York TimesMark Robinson, the state’s often incendiary lieutenant governor and a Republican, is expected to announce a run for governor as soon as Saturday. Mr. Robinson, who has said that he and his now-wife aborted a pregnancy decades ago, has since made clear that he wants greater restrictions on abortion rights in North Carolina, where Republicans now have supermajorities in the state legislature. The procedure is currently legal up to 20 weeks of pregnancy in the state.Josh Stein, the state’s Democratic attorney general who is running for governor, said in an interview that there was “no question” that he saw abortion rights as being directly on the ballot. That message was effective for Democrats in governor’s races in several critical states last year.“The only reason North Carolina doesn’t have a ban on abortion now is because we have a Democratic governor,” Mr. Stein said.A spokesman for Mr. Robinson declined to comment for this article.For Democrats elsewhere, it can be more challenging to argue that their races will decide the fate of abortion rights in their state, especially in places where abortion protections are codified. And it is far too soon to know what mix of issues will ultimately determine 2024 campaigns.Still, Democrats noted that if the Supreme Court had let the Texas ruling stand, that would have had major nationwide implications — and many stress the possibility of national abortion bans, depending on the makeup of the White House and Congress.“Even though we may have current protections for this in Nevada, if a nationwide abortion ban is imposed, Nevadans will suffer, and women will die,” Senator Jacky Rosen of Nevada, a Democrat who recently announced her re-election bid, said in an interview.In a statement, Ms. Rosen called the Supreme Court order “a temporary relief.” But in the interview, she said the Texas ruling underscored how one conservative judge could threaten the power of a major government agency.“It’s pretty frightening,” she said. 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