Stacey Abrams, the Georgia politician who captured national attention during her unsuccessful run for governor in 2018, has decided not to run for president after publicly contemplating a bid for months.

Ms. Abrams, a Democrat, will instead focus her efforts on preventing voter suppression with a new initiative called Fair Fight 2020, which takes its name from a group Ms. Abrams began last year after her election loss. It will work with state parties in battleground states to more closely monitor voter protection ahead of next year’s general election.

Ms. Abrams announced her decision Tuesday afternoon at the International Union of Painters and Allied Trades convention in Las Vegas. Though she is sidestepping the crowded Democratic presidential field, she is likely to remain atop any Democratic nominee’s vice-presidential wish list.

“There are only two things stopping us in 2020: that people have a reason to vote, and that they have the right to vote,” Ms. Abrams said. “I’ve decided to leave it to a whole bunch of other people to make sure they have a reason to vote.”