Wisconsin Gov. Scott Walker gestures as he speaks at the 40th annual Conservative Political Action Conference in National Harbor, Md., Saturday, March 16, 2013. (AP Photo/Carolyn Kaster)

Associated Press
Wisconsin Gov. Scott Walker gestures as he speaks at the 40th annual Conservative Political Action Conference in National Harbor, Md., Saturday, March 16, 2013. (AP Photo/Carolyn Kaster)
Wisconsin Gov. Scott Walker gestures as he speaks at the 40th annual Conservative Political Action Conference in National Harbor, Md., Saturday, March 16, 2013. (AP Photo/Carolyn Kaster)
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