John McCainJohn Sidney McCainMeghan McCain says Steyer should drop out: 'I hate that guy' Sanders says idea he can't work with Republicans is 'total nonsense' GOP casts Sanders as 2020 boogeyman MORE got 72.5 percent of the GOP primary vote in Kentucky, following a trend among recent Republican primary voters choosing a candidate other than the party's nominee.

Mike Huckabee, Ron Paul and uncommitted all gained more than 5 percent of the vote, with Mitt Romney not far off earning 4.7 percent.