Georgia GOP Rep. Mike Collins is expected to win his party's nomination for Senate in a special runoff election Tuesday night, which comes after he secured President Donald Trump's endorsement.

Trump endorsed Collins over the weekend while Gov. Brian Kemp, R-Ga., has been campaigning with Collins' GOP primary opponent, Derek Dooley. 

The two candidates advanced to the runoff last month and Collins will now face incumbent Democratic Sen. Jon Ossoff in November.

Collins secured the nomination with 55.5% of the vote, compared to Dooley's 44.5%, according to the Associated Press.