As commander-in-chief, I will do whatever it takes to defend America. But in defending America, we cannot lose what America stands for.

I love the Mexican people; I respect the Mexican leaders - but the leaders are much sharper, smarter and more cunning than our [American] leaders.

I hate that Mosul is falling, but I also think that for 10 years we have supplied the Iraqis and they can't stand up and do anything to defend their country, and it is all up to us?

I think we can all agree [Bashar] Assad is a bad and evil actor, but I'm not so sure that we want the Islamic rebels to be in charge of Syria either.

My worry now is that many people are talking about a partial repeal of Obamacare. If you only repeal part of it and you leave if some sort of Obamacare light, which some are talking about, my fear is the situation actually gets worse.

I think this sets a very bad precedent, the president unilaterally on his own starting war without any consent from Congress.

, I'm going to reserve judgment on [Rex] Tillerson. But I'll ask him the same question I've asked the others: do you understand the historic lesson that the Iraq war was a failure, a strategic mistake, that's what Donald Trump says.