The caller had it right. This is where Rush and Hannity and most of the conservative talking heads are hampered, though. If Rush ever said “call the RNC and tell them if they don’t listen to their base we’ll leave”, it would happen. We’d have a third, conservative party overnight.
But that’s not how they’re wired. They’re about electing the “R” too, which is why Rush’s comment I quoted is more than a bit ironic. It seems like he’s complaining about no progress being made for conservatism within the GOP-E but he makes no call for systemic change. He’s got a bully pulpit of 20,000,000 listeners. If he doesn’t use them, who will?