When Jeb Bush came on the shows and couldn't answer questions about Iraq, and when he looked like he was unsteady, it absolutely solidified the concerns that they had had all along about his skills.

Usually, you do a shakeup because you know that you have a problem or you gaps and you're going to fill those gaps.

Lots of people coming in and out the Trump Tower, not necessarily indicative of what Donald Trump policy is going to be. To have Al Gore one day, and the next day the head of ExxonMobil, what does that - what are you supposed to read into that about his stance on climate change? So, I think, again, it's going to be that the actions that he takes are significant.

Most important, you can have a war room, you can have a war plan, but if your general - in this case, it's Donald Trump - isn't following the plan and is tweeting or is going and giving interviews that contradict the plan, then none of this really matters.

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.

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.

Even on Ben Carson, he's not exactly steeped in housing policy, but his statements on the issue have also been very conservative.