(CNN) Georgia Republican Brian Kemp resigned as secretary of state on Thursday to begin his transition to the state's top office.

There's just one issue: Two days after the polls closed, the race is still undecided. CNN has not projected a winner.

Kemp currently leads Democrat Stacey Abrams, with 50.3% of the vote. But there are still ballots to count. If Kemp's share drops below 50%, the contest would automatically go to a run-off on December 4, even if he ends up as the top vote-getter.

For now, Kemp's lead stands at about 63,000 votes. The Secretary of State's office made public a spreadsheet with a county-by-county breakdown of the more than 21,000 outstanding provisional ballots. The Abrams campaign, which is staffing up for a legal fight, says there are additional ballots, many of them absentee, that have not yet been accounted for.

"Brian Kemp is 25,622 votes above the threshold for a runoff election. Twenty-five thousand votes of nearly 4 million cast are at issue in this race," Abrams campaign manager Lauren Groh-Wargo said on Thursday. "By (Kemp's) own admission, there are at least 25,000 outstanding votes, and hundreds if not thousands of more that we are learning about and discovering every day."

Read More