ATLANTA (AP) — Incumbent Democratic U.S. Sen. Raphael Warnock is projected to win his reelection bid against Republican opponent Herschel Walker.

Georgia voters decided on the final Senate contest in the country. Voters chose whether to reelect Democratic Sen. Raphael Warnock or Republican challenger Herschel Walker.

Tuesday’s contest concludes a four-week runoff blitz that’s drawn a flood of outside spending to an increasingly personal fight.

The outcome will determine whether Democrats have a 51-49 Senate majority or control a 50-50 chamber based on Vice President Kamala Harris’ tiebreaking vote.

In last month’s general election, Warnock led Walker by 37,000 votes out of almost 4 million cast but fell shy of a majority, triggering the runoff.

As polls opened Tuesday morning, a 40-degree wind chill and steady rain greeted voters in the Atlanta area.