Christina Bobb is a former Marine and a fervent believer that the 2020 election was stolen from Donald J. Trump. She went to work for him and quickly found herself enmeshed in an obstruction investigation.WASHINGTON — This spring, one of the lawyers representing former President Donald J. Trump made an urgent, high-stakes request to Christina G. Bobb, who had just jumped from a Trump-allied cable network to a job in his political organization.The former president was in the midst of an escalating clash with the Justice Department about documents he had taken with him from the White House at the end of his term. The lawyer, M. Evan Corcoran, met Ms. Bobb at the president’s residence and private club in Florida and asked her to sign a statement for the department that the Trump legal team had conducted a “diligent search” of Mar-a-Lago and found only a few files that had not been returned to the government.Ms. Bobb, a 39-year-old lawyer juggling amorphous roles in her new job, was being asked to take a step that neither Mr. Trump nor other members of the legal team were willing to take — so she looked before leaping.“Wait a minute — I don’t know you,” Ms. Bobb replied to Mr. Corcoran’s request, according to a person to whom she later recounted the episode. She later complained that she did not have a full grasp of what was going on around her when she signed the document, according to two people who have heard her account.Ms. Bobb, who relentlessly promoted falsehoods about the 2020 election as an on-air host for the far-right One America News Network, eventually signed her name. But she insisted on adding a written caveat before giving it to a senior Justice Department official on June 3: “The above statements are true and correct to the best of my knowledge.”Her sworn statement, hedged or not, was shown to be flatly false after the F.B.I.’s search of Mar-a-Lago on Aug. 8, which recovered about 100 additional highly sensitive government documents, including some marked with the highest levels of classification. And prosecutors are now investigating whether her actions constitute obstruction of justice or if she committed other crimes.On Friday, Ms. Bobb sat for a voluntary interview with Justice Department lawyers in Washington, according to three people familiar with the situation. She told them that another Trump lawyer, Boris Epshteyn, contacted her the night before she signed the attestation and connected her with Mr. Corcoran. Ms. Bobb, who was living in Florida, was told that she needed to go to Mar-a-Lago the next day to deal with an unspecified legal matter for Mr. Trump.In her meeting with the department — a development reported by NBC News on Monday — Ms. Bobb, who was accompanied by her criminal defense lawyer, John Lauro, emphasized that she was working as part of a team rather than as a solo actor when she signed the statement attesting to the return of all the documents, the people said.Mr. Corcoran, she told the Justice Department, had walked her through how he had conducted a search of a storage facility at Mar-a-Lago for the documents. She said she had believed at the time she signed the attestation in June that it was accurate, according to a person with knowledge of the situation.Ms. Bobb has made clear that she is not taking an adversarial position toward Mr. Trump in answering the Justice Department’s questions. She told investigators that before she signed the attestation, she heard Mr. Trump tell Mr. Corcoran that they should cooperate with the Justice Department and give prosecutors what they wanted — an assurance that would come to ring hollow as the investigation proceeded and became a bitter court fight.The Justice Department declined to comment. Ms. Bobb, Mr. Corcoran and a spokesman for Mr. Trump did not respond to requests for comment. A lawyer for Mr. Epshteyn did not respond to an email seeking comment.Ms. Bobb has been a fervent promoter of baseless claims that the 2020 election was stolen from Mr. Trump.Josh Ritchie for The New York TimesMs. Bobb’s trajectory is a familiar one in Mr. Trump’s orbit: a marginal player thrust by ambition and happenstance into a position where her profile and prospects are elevated, but at the cost of serious legal and reputational risk.But she stands out for a varied background — she is a former Marine who served in Afghanistan and a failed political candidate who jettisoned a conventional career to become a far-right cable news host — and for the tensile strength of her baseless conviction that the 2020 election was stolen from Mr. Trump.More on the Trump Documents InquirySupreme Court Request: The Justice Department urged the justices to reject a request from former President Donald J. Trump asking the court to intervene in the litigation over documents seized from his Florida estate.Documents Still Missing?: A top Justice Department official told Mr. Trump’s lawyers in recent weeks that the agency believed he had not returned all the records he took when he left the White House, according to two people briefed on the matter.Deflecting Demands: Mr. Trump spent a year and a half deflecting, delaying and sometimes leading aides to dissemble when it came to demands from the National Archives and the Justice Department to return the material he had taken, interviews and documents show.Dueling Judges: The moves and countermoves by a federal judge and the special master she appointed reflect a larger struggle over who should control the rules of the review of the documents seized from Mar-a-Lago.In the past two years, Ms. Bobb has emerged as one of his truest of true believers, embracing conspiracy theories with a fervor that has at times seemed over the top even to her colleagues, according to interviews with a dozen people who have worked with her over the past several years.Ms. Bobb has not been shy about expressing her opinions on conservative news outlets, speaking expansively about the court-authorized F.B.I. search and her low opinion of those who executed it.“I don’t believe that there was any classified material in there, though I’m sure the F.B.I. will say that there is,” she said in an interview with the conservative activist Dinesh D’Souza two days after the warrant was executed.Another conservative activist, Mike Farris, asked if she was concerned by the Justice Department’s aggressive approach.“I’m not too worried about it,” she replied. “They are all a bunch of cowards; they don’t have anything.”Ms. Bobb was present in the pro-Trump “command center” at the Willard Hotel in Washington before the Capitol attack, along with Rudolph W. Giuliani and other Trump stalwarts.She acted as Mr. Giuliani’s go-between with state officials in Arizona and helped fund-raise for a recount in Maricopa County that Republican leaders called a “sham.” She drafted a memo and participated in meetings to discuss a plan to appoint alternate slates of electors to reverse legitimate state election results. And Ms. Bobb created the computer file used to draft a proposal, never carried out, for Mr. Trump to issue an executive order for the federal government to seize voting machines..css-1v2n82w{max-width:600px;width:calc(100% – 40px);margin-top:20px;margin-bottom:25px;height:auto;margin-left:auto;margin-right:auto;font-family:nyt-franklin;color:var(–color-content-secondary,#363636);}@media only screen and (max-width:480px){.css-1v2n82w{margin-left:20px;margin-right:20px;}}@media only screen and (min-width:1024px){.css-1v2n82w{width:600px;}}.css-161d8zr{width:40px;margin-bottom:18px;text-align:left;margin-left:0;color:var(–color-content-primary,#121212);border:1px solid var(–color-content-primary,#121212);}@media only screen and (max-width:480px){.css-161d8zr{width:30px;margin-bottom:15px;}}.css-tjtq43{line-height:25px;}@media only screen and (max-width:480px){.css-tjtq43{line-height:24px;}}.css-x1k33h{font-family:nyt-cheltenham;font-size:19px;font-weight:700;line-height:25px;}.css-ok2gjs{font-size:17px;font-weight:300;line-height:25px;}.css-ok2gjs a{font-weight:500;color:var(–color-content-secondary,#363636);}.css-1c013uz{margin-top:18px;margin-bottom:22px;}@media only screen and (max-width:480px){.css-1c013uz{font-size:14px;margin-top:15px;margin-bottom:20px;}}.css-1c013uz a{color:var(–color-signal-editorial,#326891);-webkit-text-decoration:underline;text-decoration:underline;font-weight:500;font-size:16px;}@media only screen and (max-width:480px){.css-1c013uz a{font-size:13px;}}.css-1c013uz a:hover{-webkit-text-decoration:none;text-decoration:none;}How Times reporters cover politics. We rely on our journalists to be independent observers. So while Times staff members may vote, they are not allowed to endorse or campaign for candidates or political causes. This includes participating in marches or rallies in support of a movement or giving money to, or raising money for, any political candidate or election cause.Learn more about our process.Dominion Voting Systems is suing Ms. Bobb and OAN for promoting unsubstantiated claims that the company was part of a vote-switching scheme to favor Joseph R. Biden Jr. The House committee investigating the Capitol riot subpoenaed Ms. Bobb in March to testify about her “attempts to disrupt or delay” certification of the election and her reported involvement in drafting the executive order.She complied, but provided no proof when pressed on her claims about the election, according to a congressional aide with knowledge of her testimony.Ms. Bobb blurred the lines between covering Mr. Trump and working for him:She offered a dour after-action report of the failed attempt to appoint alternate electors to overturn the election in a previously undisclosed memo she sent to Mr. Trump on March 29, 2021, while working for OAN. The memo, obtained from a person to whom it was later forwarded, was marked “ATTORNEY CLIENT PRIVILEGE” even though she was not on Mr. Trump’s legal team at the time.“If three states changed their electors, the result of the election would have flipped,” Ms. Bobb wrote, adding a caveat at the end: It was “unclear” whether the Supreme Court would have supported the elector scheme.It is not known if Mr. Trump read it. He seems to have a mixed opinion of Ms. Bobb’s on-air work, however, grousing that she was too flattering to him in several OAN interviews, according to two people with knowledge of the situation.After leaving the Department of Homeland Security, Ms. Bobb became a host on the far-right One America News Network.Gabby Jones/BloombergMs. Bobb, a standout soccer and volleyball player during her high school years in the Phoenix area, graduated with a joint business and law degree from San Diego State University and California Western School of Law in 2008.She joined the Marine Corps, going through officer candidate school and completing a grueling basic training course in May 2010 as one of 16 women in a class of 280. She served in the Judge Advocate General’s office, representing Marines in disciplinary hearings, and was assigned for a time in Helmand Province, Afghanistan, as an operational law attorney consulting combat commanders on the legality of military operations.Those experiences, Ms. Bobb has suggested, were front of mind as she stood in the sweltering Mar-a-Lago parking lot angrily observing F.B.I. agents carrying out the search warrant. “Every service member can tell you that you have an affirmative obligation to disregard an unlawful order,” she told Mr. Farris in August.Ms. Bobb left the Marines after two years to work for a law firm in San Diego, where she served as a junior lawyer in three trademark infringement cases brought by CrossFit against local gym operators, according to court records.Ms. Bobb, second from right, during a meeting about a ballot review at the Arizona Senate in Phoenix in July 2021. In the postelection period, she blurred the lines between her work for One America News and her advocacy of Mr. Trump.Joseph Cooke/The Republic / USA TODAY NETWORKAround that time, she made her first foray into politics, running as an independent for a House seat in a predominantly Democratic district in San Diego. She kept a defiantly low profile, criticizing politicians who craved the “limelight,” maintaining a bare-bones website and raising no money.“I understand that it might not work, but it might,” she told a reporter covering the race in 2014.It did not. Ms. Bobb finished last in a field of eight, with 929 votes. She did not challenge the result.A few years later, she moved to Washington; in mid-2019, she was selected for an administrative job at the Department of Homeland Security — executive secretary. She served as a conduit for external correspondence, and her name was often attached to important memos, largely drafted by others, such as a list of locations where Mr. Trump’s border wall was to be built.The job also entailed another responsibility: ensuring compliance with federal records laws.Colleagues remember Ms. Bobb as hardworking and professional, with a bearing more military than political (she retained the habit of referring to superiors as “sir” and “ma’am”). But it soon became clear that the department’s leadership, while satisfied with her work, was not wowed with it and had no intention of promoting her, two former co-workers said.In late 2019, she requested a position in the policy unit of Customs and Border Protection but left after only a few months, they said.At that point, Ms. Bobb made an abrupt career shift, applying for a job with the San Diego-based OAN, where her connection to homeland security seemed to have been a selling point.The network’s conservative owners viewed immigration as their top priority and wanted to bolster their coverage. Ms. Bobb’s first on-air interview was with her former boss Chad Wolf, the acting homeland security secretary.It was after Election Day 2020 that she seemed to find her calling, airing multiple reports of unproven electoral fraud, culminating in a lengthy February 2021 segment, “Arizona Election Heist,” which promoted debunked and dubious claims about her home state.After the election, Ms. Bobb was also a fixture at meetings where Trump hard-liners like John Eastman and Sidney Powell discussed plans to reverse the results — which initially raised questions about whether she was embedded for reporting purposes or committed to the cause. Participants quickly concluded it was the latter, according to one of them.By December, she was back-channeling requests from Mr. Giuliani to Republican state officials in Arizona, pressuring them to authorize a recount of the Maricopa voting, despite a statewide canvass that confirmed Mr. Biden’s 10,000-vote margin of victory.“Mayor Giuliani asked me to send you these declarations,” Ms. Bobb wrote to one leader, accompanied by affidavits, according to an email obtained by American Oversight, a left-leaning watchdog group.By March 2022, Ms. Bobb decided to leave OAN and relocated to Florida to be closer to Mr. Trump and some of the senior leadership of the Trump-affiliated Save America PAC, taking a staff job that paid $144,600 a year, according to federal campaign finance records.While she has been a fixture on the airwaves and social media, Ms. Bobb requested that her name be redacted from the signed attestation about the documents when it was unsealed in late August, according to a person with knowledge of the situation.It leaked anyway.Susan C. Beachy More