Donald Trump is an unconventional president doing unconventional things. And the Trump phone call with the president of Taiwan is not something that the traditional establishment would see as a good idea to do, especially when there's not necessarily a policy behind it.

The difference there is that the [Donald] Trump number on change is so much larger than the lead that the other two have in their lanes. And that's going to be the challenge for those other two going forward. The other challenge for Marco Rubio, and this assumption that you're just going to get all those Bush and Kasich voters.

It's never a good time, when you're the president of the United States and your own party is finding lots of different ways to distance themselves from you.

If you're Chris Christie, who is governor of New Jersey, a state that obviously was impacted by 9/11, this gives you an opportunity to talk about how, as governor, you had to deal with terrorism and security issues.

The Donald Trump call in the president of Taiwan and of itself, as Henry Kissinger said, hasn't created some tremendous trouble in China. But what we don't know is whether this is just posturing or whether this is a policy change.

Trump campaigned as somebody who was very skeptical of the multinational deals. He was supportive of Brexit. He was very skeptical of NATO. So what we saw of President Trump in Europe was what we saw of President Trump as a candidate.

The real problem with Donald Trump is, if you engage him, it will only make things worse. It's like - it's a little bit what you were taught as a kid to not engage the bully, because they will continue to pick on you.