Clinton spoke at my college during his 1992 campaign--I was too far away to hear, though. George H.W. Bush also visited the same area around that time---didn't see him, just all the security, etc. Last summer I was touring D.C. and there was a motorcade--the tour guide said it was probably Cheney, just because apparently when it's the President there's always an ambulance included. Guess it's not such a big deal if something happens to the Veep!