Is Donald Trump's New Brand a Cottage Industry?

Tom Yamas: Donald Trump's new brand is not Make America Great Again, it's the mean America is going to hell. He asks if other GOP candidates believe they can win with this sort of swill. Yamas: Do they really think there are that many Republicans who want to hear this? Are they doing it tactically now in hopes of getting a nomination and then pivot to a more optimistic vision if they reach the general election or try to do so?