FILE - In this Dec. 12, 2012 file photo, Wisconsin Gov. Scott speaks in Madison, Wis. Authorities said Friday, March 1, 2013 a secret investigation into the Republican governor's former

 

              FILE - In this Dec. 12, 2012 file photo, Wisconsin Gov. Scott speaks in Madison, Wis. Authorities said Friday, March 1, 2013 a secret investigation into the Republican governor
FILE - In this Dec. 12, 2012 file photo, Wisconsin Gov. Scott speaks in Madison, Wis. Authorities said Friday, March 1, 2013 a secret investigation into the Republican governor's former aides and associates closed last week without any charges being filed against Walker. The investigation has hounded Walker - a possible 2016 presidential candidate - throughout his first two years in office. (AP Photo/Wisconsin State Journal, M.P. King., File)