I don't think he can win against Hillary. I think he can win against Bernie.
If it's Bernie v. Donald then watch out.
Why in the world would you think that? The reason that Bernie is smashing him in polling is that Bernie expands the democratic electorate and Trump contracts the republican electorate.
I think Bernie is just about the only candidate that is less centrist than Donny T. I have no data to back that up other than my own opinion.
You're right about that, but democrats really like that about Bernie, it's endearing and he's very popular with Democrats. His issue now is that the party thinks Hillary is more electable, it's the exact same issue Obama faced in '08. Trump is a divisive figure that even has large segments of his party repulsed. I still don't think there is any way he wins the nomination, I just don't see the path. Rubio, Christie, and Jeb will dominate the big blue states; Cruz will do well in heavily evangelical states. I just don't see where Donald fits in. Also bear in mind that the deeper we get into this process the heavier issues come in to play, when it comes to policy and where you stand on issues he is dead in the water.