but the 2012 republican nominee did not make an endorsement mitt romney lambasts donald trump as a phony and fraud in blistering speech we have no plans to get involved in the primary said james davis spokesman for freedom partners the koch brothers political umbrella group koch brothers wont spend money to attack donald trump in primary he was counting on the state to deliver him a victory on super tuesday bernie sanders wins crucial victory in minnesota caucus all three of the top gop candidates campaigned in the state leading up to the election donald trump wins arkansas republican primary