Rush makes more money when a democrat is in office and money is who he is loyal too and anyone who thinks otherwise isn't listening to him
If memory serves me right, Rush said he never met Reagan, but was sent a letter by the former President around 1991, where Reagan praised Rush for his staunch conservatism and basically handed over the mantle of conservative leadership to Limbaugh.
I've listened to Rush since 1990, but in recent years he's been getting a bit tiresome and boring. But there's no doubt that from Reagan, to Rush, to Gingrich and now to Sean Hannity, all four men have kept the conservative agenda front and center. Many GOP centrists and moderates don't like them at all, but its clear without all four pounding the conservative message, each in his own fashion, George W.Bush would never have been elected POTUS. You can take that to the bank.
It's a political evolution.