Perot played a major role, and I always believed he was operating on behalf of the Clintons, because he had some sort of vendetta against Bush. But there were other factors.
Clinton portrayed Bush as out of touch with the economy (it's the economy, stupid), although it was mostly lies and deception. (Surprise!) Also the Bush/Gore team had a much more dynamic look than the Bush/Quayle team, and you could sort of sense that fall we weren't going to win.
you called it just like I saw it (election or 92)
All I remember of it was that Elder Bush just seemd to play dead...gave it up without a fight.