I would say he would be possibly the Republican nominee in 2008 or 2012
He probably loses by more than Romney
Actually, if Allen's in the race & cuts into Huckabee's vote total, then his presence can probably propel Romney to victory in Iowa. So, in this scenario, perhaps it's Romney who gets the nomination.
Oh I meant if he was the nominee in 2012 compared to how Romney did in 2012
I honestly think VA and FL would've flipped with Allen as the nominee. Still loses but does better with 248 electoral votes.