The GOP primary for governor will test Trump's influence in the state and whether an anti-establishment streak remains alive and well in the party. Republican primary voters in Minnesota have backed the GOP-endorsed candidate in every election since the mid-1990s. Lindell, Qualls and Demuth each sought Trump's endorsement in the governor's race. The Republican Party of Minnesota, which endorsed Qualls, has gone on the offensive against Lindell as polls showed him leading the GOP primary field. A Demuth or Qualls victory would be historicGOP voters would make history if they nominate Demuth or Qualls on Tuesday.