Rush just blew off the Obama SSN charges in a reply to the caller. "I've seen that. I don't know about it."
Rush probably feels like I do that Barry has worked for the CIA before and Rush doesn't want the goobermint swooping down on him.
That would explain the bogus SS#.
He's not scared, but Rush feels he can do some real good staying on the air and guiding folks to the truth and research issues..