The success of their efforts - targeted advertising, virtual events and even door-to-door canvassing despite the coronavirus pandemic - will likely decide the outcome, analysts said.
"High Black voter turnout is essential to a Democratic victory," said Andra Gillespie, a professor at Emory University in Atlanta. "If their turnout rate is lower than it is for other groups ... that'll help dig a hole that Democrats won't be able to dig out of."
If either or both Republican incumbents, David Perdue and Kelly Loeffler, win, their party would retain a Senate majority – and the power to thwart Democratic President-elect Joe Biden's legislative agenda on everything from the economy to climate change and race relations.
Even as Biden was scoring a surprise victory over President Donald Trump in Georgia in the Nov. 3 election, Perdue finished ahead of Jon Ossoff, a documentary filmmaker, falling just short of the 50% needed to avoid a runoff. The Rev. Raphael Warnock, senior pastor at Atlanta's Ebenezer Baptist Church, a historic Black church, and Loeffler led a large multi-candidate field in the other race.
In outperforming Trump, Perdue benefited from Republican-leaning voters who disliked Trump but were not willing to vote for down-ballot Democrats.