Wisconsin Gov. Scott Walker said he's heard some of his fellow Republicans say they won't support Donald Trump if he's the party's nominee in the general election.

Just last week Republican Rep. Reid Ribble, also of Wisconsin, said he would not back Trump as the nominee. Asked on the Charlie Skyes Show on WTMJ about Ribble's comments that many other Republicans have expressed the same sentiment privately, Walker said, "I hear that, I made it clear when I was a candidate, I signed off, that first debate, I said I will support the nominee and I will support the nominee of the party, but I hear that grumbling. I heard that even before I suspended our campaign. I definitely hear that going around the state of Wisconsin."

Walker cautioned, however, that historically front-runners at this point in presidential primary process fade before the voting takes place.

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