People forget that before his "Macaca Moment" https://en.wikipedia.org/wiki/Macaca_(term)#2006_George_Allen_incident he was not only favored to win re-election to the US Senate from VA in 2006, but was considered one of the leading contenders for the GOP nomination for the presidency. Granted, any GOP presidential candidate would have a hard time winning in 2008, given the financial crisis. But if he isn't nominated then, he may have a good chance to be nominated in 2012, where the GOP's prospects were at least brighter than in 2008. (Of course Allen's very presence in the Senate could complicate things, because it would make it harder for example for Obama to pass the ACA.)