Raphael Warnock became the first African-American to win a US Senate seat in Georgia, as fellow Democratic contender Jon Ossoff clung to a narrow lead in a second contest that will decide which party controls the upper chamber of Congress.
As of 2am US Eastern Standard Time, Mr Warnock had 50.5 per cent of the vote with a lead of roughly 40,000 over Republican incumbent Kelly Loeffler, prompting the Associated Press to declare him the victor.
In the other Georgia Senate race, Mr Ossoff led Republican incumbent David Perdue by about 9,500 votes. Roughly 4.4m votes had been counted by 2am, with many of the remaining ballots expected to come from areas that favour Democrats.