Bush - 8 more years?

Bush - 8 more years?
I was troubled to read that President Bush suggested his brother Jeb would make a good president.
Troubled because Jeb would make a good president - certainly better than his intellectually challenged little brother.
The only serious candidate for the Republicans at the moment is senator John McCain - you might remember him from last time.
If the Democrats do select senator Hilary Clinton to fight, then Jeb might be a serious option. He has an Hispanic wife, speaks Spanish and could challenge the Democrat dominance among minorities.
Not to mention that the last President elected from the Senate was John F Kennedy in 1960. Since then the electorate have always voted for candidates who had served as a state governor or as vice-president.
As you know, Jeb is a very popular governor of Florida.
The only question is - what skeletons are there in Jeb's closet that stopped him from running in 2000 instead of George?