FILE - In this Friday, March 11, 2011 file photo, Wisconsin Gov. Scott Walker signs a bill at a ceremonial event in Madison, Wis. Gov. Walker signed into law the controversial bill that

 

              FILE - In this Friday, March 11, 2011 file photo, Wisconsin Gov. Scott Walker signs a bill at a ceremonial event in Madison, Wis. Gov. Walker signed into law the controversial bill that
FILE - In this Friday, March 11, 2011 file photo, Wisconsin Gov. Scott Walker signs a bill at a ceremonial event in Madison, Wis. Gov. Walker signed into law the controversial bill that eliminates most union rights for public employees, delivering a defeat to the U.S. labor movement which vowed to fight back. (AP Photo/Morry Gash)