FILE - In this Monday, June 4, 2012 file photo Russian tycoon and former presidential candidate Mikhail Prokhorov speaks at his news conference in Moscow. Mikhail Prokhorov announced on

 

              FILE - In this Monday, June 4, 2012 file photo Russian tycoon and former presidential candidate Mikhail Prokhorov speaks at his news conference in Moscow. Mikhail Prokhorov announced on
FILE - In this Monday, June 4, 2012 file photo Russian tycoon and former presidential candidate Mikhail Prokhorov speaks at his news conference in Moscow. Mikhail Prokhorov announced on Saturday that he's leaving business to take up full-time politics. (AP Photo/Alexander Zemlianichenko, File)