John McCainJohn Sidney McCainChoking — not cheating — was Trump's undoing Gabby Giffords congratulates Mark Kelly with throwback photo of her own swearing-in McConnell in tough position as House eyes earmark return 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.