U.S. Sen. David Perdue is essentially tied with Democrat Jon Ossoff, with the Republican incumbent at 45% and his challenger at 46%. About 4% back Libertarian Shane Hazel, and 5% are undecided. The close margins raise the possibility the race could head into a January runoff.

Another round of voting is almost certain in the special election for U.S. Sen. Kelly Loeffler’s seat, where the 21-candidate race makes it extremely difficult for anyone to win the majority-vote necessary to avoid the runoff.

Democrat Raphael Warnock, the pastor of Atlanta’s famed Ebenezer Baptist Church, has opened a large lead compared with the last AJC survey, which was conducted in September. He’s climbed to 34% — up from 22% a month ago — while the other Democrats on the ballot have dropped to single digits…

The poll pegged Collins at 21% and Loeffler at 20%, mirroring other recent surveys that showed a tight race between the two. About 3% of voters back Libertarian Brian Slowinski, and 14% are undecided.