http://youtu.be/X244jadVnRU

Most of you will remember this ad.  The Dukakis-Bush contest was actually close at one point, but the image of Mike Dukakis in a tank proved so incongruous that it made security-minded Americans cringe (his handlers were trying to show just the opposite — that Dukakis wasn’t weak on national defense).  It was the coup de grâce in a race where Bush had already begun pulling away.