Few start out as Republicans. Most of us believe in the Tooth Fairy and Halloween as children. If Rush thinks Trump is a conservative, which he must or he would not give him air time, then that puts him miles ahead of the Romneys on the list, SFAIAC.
Rush wants guests that make him look good. The Rush Limbaugh show is about The Rush Limbaugh show.
He has Gingrich on as well, who has screwed us over royally.
Money speaks louder than hype.