MADISON, Wis. (AP) -

The recounting of the presidential election results in Wisconsin is underway. It's the first candidate-driven recount in the United States since Florida in 2000.

Green Party candidate Jill Stein requested the recount that started Thursday, even though she has no chance of picking up the roughly 1.3 million votes needed to win. Donald Trump beat Hillary Clinton by about 22,000 votes in Wisconsin.

Stein says she wants a recount to ensure ballot tabulating machines were not compromised by hackers.

Workers in 72 counties across the state began recounting ballots at 9 a.m. They have until 8 p.m. Dec. 12 to finish.

Observers representing Democrat Hillary Clinton, Republican Donald Trump and Green Party presidential candidate Jill Stein are spread out throughout Wisconsin to watch as ballots are recounted.

Trump's Wisconsin campaign director Pete Meachum was in Madison on Thursday for the start of the recount. Meachum says the campaign had people in every major county across the state.

In Madison, about 40 workers gathered in two conference rooms overflowing with sealed bags of ballots from across the county.