Teamsters General President Sean O’Brien, a self-described lifelong Democrat, endorsed Republican Sen. Ashley Moody and cast his Florida ballot for her, a rare labor break that hit Democrats hard as Election Day arrived.

Fox News reported that O’Brien announced the move Sunday, saying he had just voted in Florida for the first time and was proud to support the Republican incumbent against Democrat Angie Nixon.

The endorsement from the head of one of the nation’s oldest and largest unions lands as polls open nationwide and as Florida’s Senate race draws national attention. O’Brien leads the International Brotherhood of Teamsters, a 123-year-old organization with about 1.3 million members, and his choice undercuts the long pattern of national union leadership leaning Democratic.

O’Brien did not frame the decision as a party switch. He framed it as a worker record. He cited Moody’s help protecting pensions, defending good-paying jobs, and backing well-funded union apprenticeship programs.

"Just voted in the State of Florida for the first time, and very proud to have cast a ballot for Sen. Ashley Moody,"

O’Brien said in the announcement covered by outlets tracking the race. The New York Post noted the same statement and the break it represented from typical labor alignment.

He went further on policy. Moody sits on the Senate HELP Committee, and O’Brien said the Teamsters want her help passing the Faster Labor Contracts Act and getting it signed into law.

"Sen. Moody has been extremely helpful working with the Teamsters to protect workers’ pensions, defend good-paying jobs, and support well-funded union apprenticeship programs."

That line, repeated across coverage, put concrete worker issues ahead of party labels. O’Brien added that the union looks forward to working with her on the HELP Committee to move the contracts bill.

Moody answers with a working-families pitch

Moody’s campaign answered the endorsement in plain terms. The former Florida attorney general, now the Republican senator, said she will keep fighting for hardworking Americans, stronger jobs, and training for the next generation.

"I’ll always fight to protect hardworking Americans, strengthen good-paying jobs, and ensure resources are available to train our next generation. It’s been great to deliver for Florida’s working families,"

Moody said. The statement matched the issues O’Brien listed and gave Republicans a ready message for union households that often hear only Democratic appeals.

The Washington Examiner reported that Moody, appointed by Gov. Ron DeSantis, holds a sizable polling advantage and carries President Trump’s backing in the Florida contest.

That combination, a major union president, a Republican incumbent with a lead, and a clear worker-focused message, leaves Democrats defending ground they once treated as automatic.

High-profile political flips of this kind have piled up elsewhere, including cases where public figures snub Democrats and back Republicans in closely watched races.

Nixon fires back and courts the rank and file

Democratic nominee Angie Nixon, a state lawmaker from Jacksonville whose platform is described as aligned with the Democratic Socialists of America, answered on X. She posted a photo she once took with O’Brien and drew a sharp contrast.

Nixon wrote that “Ashley Moody never walked the line with you.” She followed with a direct appeal to union members who still back her.

"But ok brother. Shout out to all the rank and file Teamsters that are voting for me. I will always stand with you,"

Nixon posted. The reply tried to separate the union’s top officer from its members and keep the race focused on street-level solidarity rather than the endorsement itself.

Coverage also noted that former President Barack Obama endorsed Nixon after she sought party support, while Rep. Alexandria Ocasio-Cortez has publicly backed her as well. Those left-wing seals of approval sit beside O’Brien’s decision and underscore how far the Democratic coalition has stretched, and frayed, in Florida.

Democrats have spent recent cycles managing internal fights over culture and strategy, a pattern visible when progressive voices scold their own party after losses and retreats.

O’Brien’s path from RNC stage to Florida ballot

O’Brien’s Sunday announcement did not come from nowhere. He spoke at the 2024 Republican National Convention after, by his own account, the Democratic Party snubbed his request to address its convention. At the time he made clear he would take heat from both sides.

"If the far-left want to criticize me and attack me, that’s OK. If the far-right wants to do the same, that’s great. I represent 1.3 million hardworking men and women,"

O’Brien said then. The line still fits. Online critics of the Moody endorsement called him a “scab.” One top commenter on his post mocked the optics of a union leader moving into what the commenter called a famously anti-union state, voting for a candidate the commenter labeled anti-union, and then bragging about it.

His Florida vote also appeared to signal a personal move from his hometown of Boston. Fox News Digital reached out to the Teamsters and to Moody’s campaign for further comment beyond the public statements.

O’Brien’s relationships in Washington have shifted too. He once nearly came to blows with then-Sen. Markwayne Mullin during a Senate hearing; the two later became acquaintances. Mullin now serves as secretary of homeland security. In late October 2025, O’Brien appeared at a press conference outside the West Wing flanked by Vice President JD Vance and Transportation Secretary Sean Duffy, another sign of open lines to the current administration.

Republican strength on the ground has shown up in other midterm markers as well, from packed Trump events that dwarf thin Democratic crowds to map fights in which GOP redistricting gains held while Democratic countermoves failed.

What the endorsement actually tests

Labor endorsements have long been treated as Democratic infrastructure. When the general president of the Teamsters publicly votes for a Republican senator in Florida and praises her pension, job, and apprenticeship work, that infrastructure looks less automatic.

O’Brien’s stated reasons stay narrow and practical: pensions protected, jobs defended, apprenticeships funded, and a labor contracts bill he wants moved through the HELP Committee. Moody’s reply stays on the same ground. Nixon’s reply tries to reclaim the picket-line image and the rank-and-file vote.

Voters will sort those claims at the ballot box. The larger signal is already public. A major union leader who calls himself a lifelong Democrat decided a Florida Republican’s record on workers mattered more than party habit, and he said so out loud while polls opened.

When union bosses start grading Republicans on results instead of party labels, Democrats lose a shield they have relied on for decades, and workers finally get to judge the record for themselves.