Wisconsin's historic recall elections probably won't happen until early June.

State election officials said in a memo Thursday that they could schedule Wisconsin's recall primaries as soon as May 1, and general elections by May 29. But they said they want to avoid conflicts with the May 28 Memorial Day holiday and need to give municipal clerks enough time to complete their work on the April 3 spring election and presidential primary before preparing for recalls.

Also on Thursday, recall target Lt. Gov. Rebecca Kleefisch, like Gov. Scott Walker did Monday, said she won't challenge any of the recall signatures against her.

Nevertheless, the Government Accountability Board said Thursday that it may still request more time to in order to review petitions. It also said it had considered using statistical sampling methods to look for duplicate signatures on the Kleefisch petitions, but instead decided to treat them the same as those against other officials targeted for recall.

Democrats and other recall organizers reported turning in about 1.9 million signatures in January, including some 1 million signatures against Walker and about 845,000 against Kleefisch. Recall elections would be triggered against Walker and Kleefisch if state election officials find at least 540,208 valid signatures against each of them.