Democrats in Wisconsin chose Milwaukee Mayor Tom Barrett for the upcoming recall election against Governor Scott Walker, which is set for June 5. It's been well over a year since Gov. Walker first earned the wrath of Wisconsin Democrats after backing a bill removing collective bargaining rights from public sector union members. In a proud union state like Wisconsin, the position was met with quick and enduring fury from Democrats and demands for a recall election. Shawn Johnson, capitol reporter for Wisconsin Public Radio, explains what's happened since.