The incumbent Democratic senator Jon Ossoff, who is not being challenged in this year's primary, is waiting to see which of three leading G.O.P. candidates he will face in the general election. Representative Mike Collins, the founder of a trucking company and a strong supporter of Donald Trump, is the front-runner. He is perhaps most famous for falsely accusing Joe Biden of having "sent the orders" for the assassination attempt against Trump in Butler, Pennsylvania. Collins's main competitors are Derek Dooley and Buddy Carter.