Voters are heading back to the polls in Georgia Tuesday for primary election runoffs featuring one contest that pits President Donald Trump’s endorsement against Gov. Brian Kemp’s. Photo by Samuel Corum/UPI | License Photo

June 16 (UPI) -- Voters are heading back to the polls in Georgia on Tuesday for primary election runoffs featuring one contest that pits President Donald Trump's endorsement against Gov. Brian Kemp's.

Among the key races that will be decided Tuesday is the race to see who will challenge Democratic Sen. Jon Ossoff in November's midterm election. Trump has endorsed Rep. Mike Collins and Kemp endorsed Derek Dooley.

Kemp gave Dooley, a former college football coach, his endorsement in August. He reiterated his support in a social media post on Monday, asking voters to choose the "conservative fighter who will put Georgians first."

Trump endorsed Collins on Friday after early voting ended. The president posted his endorsement on social media, calling Collins a "warrior and winner."