MADISON, Wis. – A recall election was officially ordered Friday against embattled first-term Wisconsin Gov. Scott Walker after more than 900,000 signatures were collected on petitions to force a vote.

The Government Accountability Board voted 5-0 to order the recall, a move that has been expected for weeks given the high number of signatures gathered between November and January. It took 540,208 signatures to trigger a recall.

Assuming a Democratic primary is necessary, it will be May 8. The actual recall vote then will be June 5. Three Democrats already have announced they are running and Milwaukee Mayor Tom Barrett, whom Walker defeated in 2010, has said he would announce his intentions before Tuesday.