“The longer we go with Trump or Carson at the head of the pack, the more likely it is that we get to Cleveland without a nominee,” said one GOP strategist with ties to Karl Rove’s super PAC American Crossroads.

Still, there is skepticism in Republican circles that Walker would be the consensus candidate to emerge victorious from a floor fight. One GOP source called it “crazy.”

And one of the strategists with ties to Wisconsin said, “The problem is that if you had a brokered convention scenario, [Walker] wouldn’t even be the most likely person out of Wisconsin to win the nomination. That would be Paul Ryan.”