A government watchdog has filed a complaint with the Federal Election Commission alleging Alaska Senate candidate Daniel J. Sullivan illegally coordinated with an outside group that has spent roughly $1.5 million targeting his namesake, Republican Sen. Dan Sullivan.

Americans for Public Trust alleges that Democratic strategist Amber Lee provided consulting services to Daniel J. Sullivan's campaign while simultaneously serving as a board member and secretary of the 907 Initiative, an Alaska-based nonprofit that has spent heavily on advertising against the incumbent senator. The complaint argues that the overlapping roles could amount to illegal coordination under federal campaign finance law.

Daniel J. Sullivan, a retired teacher from Petersburg, entered the Republican Senate primary earlier this year despite sharing nearly the same name as the incumbent. Critics have dubbed him “Decoy Dan” and accused him of entering the race to confuse voters, an allegation he has denied while maintaining that he is a legitimate Republican candidate.

According to Americans for Public Trust, the 907 Initiative spent approximately $1.5 million on advertisements targeting Sen. Sullivan, including about $575,000 during the final 90 days of the primary campaign. The complaint alleges that Lee was working with Daniel J. Sullivan while the organization was simultaneously running advertisements against the incumbent.

The complaint points specifically to an advertisement released by the 907 Initiative on May 28, one day before Daniel J. Sullivan formally filed his candidacy. The ad, titled “Stop Raising Costs,” targeted the incumbent senator.

Federal campaign records cited in the complaint show that Daniel J. Sullivan's campaign owed Amber Lee Strategies $4,380.41 for website and digital consulting services. Americans for Public Trust alleges that Lee also helped Sullivan file his candidacy and worked on campaign materials while serving in a leadership role with the 907 Initiative.

“It is absolutely a violation of federal election law for someone to wear two hats,” Americans for Public Trust Executive Director Caitlin Sutherland told the New York Post. She argued that someone working for a political campaign cannot simultaneously work with an outside group spending substantial amounts of money on advertising benefiting that campaign.

The 907 Initiative has denied the allegations. Executive Director Aubrey Wieber told the Post that the accusation was “patently false,” saying the organization never employed or paid Lee and that she served only as a board member. Wieber also said the organization had no involvement in Lee's work with Daniel J. Sullivan's campaign and that he learned about the connection through news reports.

The FEC complaint asks the commission to investigate whether the 907 Initiative's spending should be treated as prohibited, excessive, or unreported contributions to Daniel J. Sullivan's campaign.

The complaint is the latest in a series of controversies surrounding Sullivan's candidacy. The Alaska Division of Elections initially ruled that he should not appear on the ballot, but he challenged the decision and was ultimately allowed to remain in the race. He advanced from Alaska's August open primary to the general election.

The National Republican Senatorial Committee has also previously filed complaints alleging that Daniel J. Sullivan and Lee engaged in activity designed to mislead voters and that Lee provided potentially unlawful campaign assistance. Those allegations remain pending.

Separately, the candidate has faced scrutiny over a reported federal investigation into whether his candidacy was part of an effort to confuse voters. Reports last month said federal prosecutors had issued grand jury subpoenas as part of that investigation. No charges have been announced.

The latest FEC complaint remains an allegation, and the filing itself does not definitively establish that Daniel J. Sullivan, Amber Lee, or the 907 Initiative violated federal election law. The Federal Election Commission would have to investigate the allegations and determine whether any violation occurred.