Candidates in Louisiana and Georgia must win 50 % to win a runoff . Comment: A new CNN/ORC poll released Friday shows Democrat Michelle Nunn leading Republican David Perdue 47 % to 44 % among likely voters . The winner of the primary is determined by how many votes are cast for that candidate, not who wins the majority vote.
Candidates in Louisiana and Georgia must win 50 % to win a runoff . Comment: The winner of the primary is determined by how many votes are cast for that candidate, not who wins the majority vote.