I utterly detest Glenn Beck, but at the same time, his audience votes in all of the relevant primary states. Ron Paul made appearances on his show despite being sand-bagged, but Rand Paul is going the typical politician route of being all things to all people, which is essentially what every president we've had since Abraham Lincoln has done barring maybe Grover Cleveland and Calvin Coolidge (and even the latter was not always principled in his rhetoric if I recall my readings correctly).
I think ultimately Rand's problem is that he understands the depraved political culture that America has and is playing to it properly while much of his father's base is trying to cleanse it of its corruption. Rand is thinking short-term, while everyone here is thinking long-term.
“My attitude toward progress has passed from antagonism to boredom. I have long ceased to argue with people who prefer Thursday to Wednesday because it is Thursday.” - G.K. Chesterton