MADISON, Wis. (AP) – 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. Trump won Wisconsin by about 22,000 votes, or less than a percentage point.

Stein has raised questions about the integrity of votes cast in Wisconsin, Pennsylvania and Michigan without presenting any proof of wrongdoing.

Stein said in a statement that “verifying the vote through this recount is the only way to confirm that every vote has been counted securely and accurately and is not compromised by machine or human error, or by tampering or hacking.”