A Cygnal poll released in May showed Ossoff with a two-point lead over Collins, winning 45.7 percent of the vote compared to the Republican's 43.3 percent. Eleven percent remained undecided. That poll surveyed 800 general election voters from May 15 to May 17 and had a margin of error of plus or minus 3.41 percentage points.

The GOP primary to challenge Ossoff has already drawn Republican Rep. Buddy Carter, who is also courting the Trump endorsement and announced a run for Senate in May. Georgia Insurance Commissioner John King, a Republican, is also running for the seat.