Republican voters across Georgia cast their ballots Tuesday in a closely watched U.S. Senate primary race that could help shape the balance of power in Washington.

Mike Collins won 40% of the vote in the Republican primary, with 362,627 votes. Collins will face Dereck Dooley, who claimed 269,659 votes, representing 30% of the vote. 

The runoff will take place on June 16. 

Jon Ossoff ran unopposed and will face the winner of the runoff in the November general election.