Let’s not forget that Trump pre-2015 was fairly liberal, so he would get some votes from Obama. Let’s say in 2012 he runs on a platform that’s a mix of economic leftism and social conservatism. In the wake of a 2008 recovery that for many people, wasn’t a recovery and the TEA Party movement he could do very well, maybe even win if he picks someone like Bernie as VP. Many who traditionally sit out of elections would vote for him. On a platform that’s economically leftist and social conservative he could win votes from both the Urban poor, and rural areas. This would make him a strong candidate. (for those wondering why I picked a platform that’s economically left, but socialy conservative, Trump was kinda a centrist in 2012, and his pick thing is that he, at least in rhetoric, is a populist, and a platform that’s economically left, but socialy conservative is that it doesn’t give a preference to either side of the American political spectrum, but still populist)