Republican Clay Fuller is projected to have won Georgia’s runoff election to replace former Congresswoman Marjorie Taylor Greene, a once-staunch ally of Donald Trump who resigned earlier this year after breaking with the president.

Fuller won the election to replace her on Tuesday, according to CBS News, the BBC’s US partner. He is a Trumpendorsed candidate who won against Democrat Shawn Harris, and whose victory keeps the strongly conservative district in Republican hands.

The win shores up the party’s razor-thin 217-214 majority in the House of Representatives. Fuller, a lieutenant colonel in the Georgia Air National Guard, will serve out the rest of Greene’s term, which ends next January.

He said in an interview with Fox News on Tuesday night that Trump’s endorsement was “the key factor in us winning”