Barack Obama has also given Abrams his full-throated support, while Republican Donald Trump endorsed Kemp six days before the July GOP runoff.
Carter's grandson Jason, the party's 2014 nominee, also endorsed Abrams after staying on the sidelines during the primary. Virtually all of the state party's leading figures – and many of her party's 2020 presidential hopefuls – have publicly backed Abrams.
So have Hillary Clinton and Bernie Sanders, the two leading Democrats in the 2016 contest. (Ex-President Bill Clinton has yet to weigh in on the race, though one of his top advisers backed her rival in the primary.)
Abrams hopes her progressive policies will mobilize a legion of left-leaning voters, many of them minorities, who rarely cast ballots. Since locking up her party's nomination, she's traveled the state highlighting what she calls "solvable problems" and touting her education and economic plan.
Kemp has steadily tried to move toward the political center with a more nuanced approach to the "religious liberty" debate while also stepping up his appeal to the party's conservative base by highlighting his anti-gang crackdown.
Read more recent AJC stories about the governor’s race:
Georgia GOP assails Abrams for not voting on sex trafficking crackdown
Georgia’s black women key to Stacey Abrams’ bid for governor
Kemp demands TV stations pull attack ads
Business backlash: Why some Georgia firms face political fallout
In filling another Supreme Court vacancy, Gov. Deal achieves milestone
Jimmy Carter to hit the campaign trail with Abrams in Plains
A closer look at the ‘not surprising’ nature of Trump’s Georgia endorsement