Many libertarians see Rand as a heretic because he's willing to make compromises. This couldn't be a more misguided viewpoint. The only way libertarianism will take hold in this country is if libertarians quit the intellectual purity nonsense and move the liberty movement forward as elected officials. Rand has been making compromises in order to climb in Washington, and, now that even Bill Kristol sees him as a "plausible" presidential candidate, I dare say you can't argue with the results.
Kristol starts talking about Rand around 1:30.