MADISON, Wis. (AP) -- Political foes hoping to recall Republican Wisconsin Gov. Scott Walker over his moves to significantly curb union rights plan a late-night rally and early morning pajama parties to officially kick off the effort.

Events are planned statewide Tuesday, when recall supporters can begin collecting the more than 540,000 signatures required to get a recall election on Wisconsin's ballot next year. Lt. Gov. Rebecca Kleefsich and three Republican state senators also will be targeted for recall.

The recalls organized by Democrats, labor unions and others, are largely motivated by adoption of a Walker-supported law that effectively ended collective bargaining rights for most public workers.

Recall organizers hope to tap ongoing anger over the collective bargaining law and build on momentum from last week's vote rejecting a similar law in Ohio.