then the tapes would be available. Even though live, it would have been recorded. The first two sources you cited were from the same writer, Dana Milbank who just so happens had no audio of it. The third is from only one person, the reporter, who alleges he heard this but amazingly no one else did and the secret service said it is bogus as Lola provided us. I just went over to youtube and lsitened to a number of videos where it was alleged to have been said an do not hear any such thing.
My suggestion to you is to contact the secret service and tell them what you think you heard and where it was said. There will be a tape of anything and everything that has been broadcast by FCC rules. Sorry, but I think people are just "hearing things".
How about those t-shirts?