Hillary Clinton's weakest group, though, is people under 30, the young.

Mitt Romney, Jeb Bush, Chris Christie, sort of the three big hitters on the Republican side.

I don`t know how it would have gone, but I do know this - Mitt Romney was looking at running and the reason he decided not to run was because he decided that someone was unbeatable. That someone was Jeb Bush.

He [Donald Trump] found that sweet spot in the Republican Party, just politically, where you had the rest of the party saying it`s just impractical. You can`t deport 11 million people. You can`t round them up and deport them, and his position was basically, hey, Republican voters. Don`t listen them, you can and I will.

Probably not a surprise that, among the people of Mexico, just 4 percent say that they have a positive opinion of [Donald] Trump. Seventy-five percent say they have a negative opinion.

Here`s an interesting twist, though, President Pena Nieto later tweeting that he told [Donald] Trump in their private meeting that Mexico will not pay for the proposed border wall, Trump saying, though, in that press conference that it didn`t come up.

I think three weaknesses have emerged for Hillary Clinton in early states.One is young voters. Another is political independents. He`s winning with independents who show up. But the other one - this is the inverse of what we saw in `08 - working-class white voters. In 2008, they stuck with her all the way.