It is notoriously difficult for an incumbent party to get more than three terms in the United States. Had Gore won in 2000, what would his odds have been come 2004?
I have a strong feeling he'd face some sort of challenger from the left. If Nader's 2000 bid isn't blamed for Gore's loss, there'd likely be more voters willing to vote for a third-party candidate.
Who would the Republicans run against Gore? I don't think McCain is likely to get the nomination. George Allen maybe?
Does Gore keep Lieberman?