Donald Trump spoke at CPAC, and he was booed when he called for ground troops in Iraq to fight ISIS:

In the same question and answer period with Sean Hannity, he [Trump] embarrassed himself yet again when he outlined his strategy to fight ISIS, which was nothing more than “he’d hit them really hard.” With what? We don’t know, but when he supported sending ground troops against ISIS, the crowd turned on him.

Hannity: A, to stop Iran’s nuclear program and B, to defeat ISIS, cause I don’t hear say degrade them, I hear you say defeat them.

Trump: Defeat. Well, with ISIS, I’d just hit them really hard and that would probably and a year ago you wouldn’t have said it and nobody wouldn’t have likes it, you may have to have some boots on the ground for a period of time until you’re rid of the cancer. (boos) That’s number one, you may have to have it Look, they’re cutting off the heads of people, they’re burning at the stake, It’s like we’re living in medieval times.

(emphasis original)

Unfortunately, the video has been deleted by the user, but the fact that the crowd at CPAC, who have pretty much defined themselves as the wingnuts of wingnuts, have come to the conclusion that the John McCain school of foreign policy is without merit is significant.

If the war forever has lost the CPAC crowd, they have lost the nation.