I hate to rain on your parade, but Rush will NEVER run this. You cannot substantiate this or confirm it via another source (unless you can get a couple other passengers to back you up), and you overheard an otherwise private phone conversation - the Dems would have a field day attacking a story based on such.
If I were you, I would enjoy the fact that you confirmed what freepers suspected all along - that Dem operatives conjure up weaselly talking points and coordinate what seems to be spontaneous campaigning. But don't expect media outlets to run with it.