Donald Trump is accomplishing getting, particularly white, working-class voters, who are turned off by their own party.

I think in theory, Donald Trump could be a formidable candidate, right? The theory of him is, if he ignites working class white voters, he can put Pennsylvania, Wisconsin, states like Ohio in play for the Republicans.

Campaigns and primaries can get ugly. There are always messy squabbles.

It's not enough to keep winning seconds and thirds. At some point, Ted Cruz has actually won on. [Marco] Rubio's got to actually win a state.

I think it`s going to be an important policy, the opening of Cuba and I think political policy for the hemisphere.

Marco Rubio has felt the wrath of Chris Christie and proved that he has a glass jaw. And I think that the question is going to be could he withstand a similar barrage from Donald Trump, who is relentless in going after the people he thinks are a threat to him.

I think that behind the scenes the Pope [Francis] is seen as more of a religious figure, but obviously he is sort of a global political figure.