But examine the transcript at length from last night's townhall when Trump addressed the Iraq war and you'll see Trump is sticking to his guns:
QUESTION: So - so do you think - do you think the president of the United States, George W. Bush, lied to the American people?
TRUMP: Well, look, I'm not going to get your vote, but that's OK. Let me just (inaudible). QUESTION: I'm just giving you another shot at it.
TRUMP: Let me - let me tell you something. I'll tell you it very simply. It may have been the worst decision - going into Iraq may have been the worst decision anybody has made, any president has made in the history of this country. That's how bad it is, OK?
Limbaugh's been under a lot of pressure from callers this week accusing him of stilted coverage which has showcased Trump at the expense of Cruz and the others. The last couple of days have suddenly featured more self-conscious attempts to show Rush's independence by including less than flattering coverage of Trump. It's not very convincing.
Limbaugh knows Ted's a losing proposition, but isn't all-in for the popular and undoctrinaire conservative Trump, whom Limbaugh customarily calls a non ideological candidate. The absence of that is what is holding Limbaugh back.