Mike Collins holds a commanding lead in the Georgia Republican Senate primary runoff market due to his strong first-place finish in the May 19 primary with 40.5% of the vote, ahead of Derek Dooley and Earl “Buddy” Carter. Recent polls have shown Collins maintaining an edge in the June 16 contest, though margins have tightened. President Trump’s endorsement of Collins on June 14 has further bolstered trader confidence, aligning the congressman with the party’s dominant faction against Dooley, who carries Governor Brian Kemp’s support. Other candidates trail far behind with negligible support. A late surge by Dooley or unusually high turnout favoring Kemp-aligned voters could narrow the gap, but Collins’s primary performance, polling consistency, and high-profile backing make significant shifts unlikely before results are finalized.