Two Trump-backed Republicans won special congressional elections in Florida on Tuesday, according to The Associated Press, shoring up their party’s slim majority in the House at a crucial moment for President Trump’s domestic agenda.

Jimmy Patronis, the state’s chief financial officer, won the race to replace Matt Gaetz in the First Congressional District, on the western end of the Panhandle. With most of the vote counted late Tuesday, Mr. Patronis had won 57 percent.

And State Senator Randy Fine captured the Sixth District seat that had been held by Michael Waltz, now Mr. Trump’s national security adviser. That district is rooted in Daytona Beach and parts of the northeast coast. Mr. Fine had 56.7 percent of the vote as of 9 p.m.

Both seats had been expected to remain in Republican hands, though some private polls showed Mr. Fine facing a close contest against Josh Weil, his Democratic opponent. Mr. Weil and Gay Valimont, the Democrat who ran against Mr. Patronis, each raised millions of dollars for their campaigns despite the Democrats’ struggles in Florida.

Get live results and maps from the 2025 Florida special election.

Mr. Gaetz resigned from his House seat last year after Mr. Trump nominated him to be attorney general. He later withdrew from consideration for that post, amid an ethics investigation into allegations of sexual misconduct and drug use.

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