When you're running for president, I think you have an obligation to be healthy. I just don't think you can do the work if you're not healthy.

I will build a great, great wall on our southern border, and I will make Mexico pay for that wall. Mark my words.

We should be building a nation and it should be called the United States of America. We are spending all our money nation-building in other places and they don't even want us.

That is why immigration limits are established in the first place. If we only enforced the laws against crime, then we have an open border to the entire world. We will enforce all of our immigration laws.

I love the people. I really like this administration [of Enrique Peña Nieto]. I think he's a good man. We get along very well. But they have problems controlling aspects of their country. There's no question about it, and I would say the drugs and the drug cartels, No. 1.

If I'm the nominee, I will pledge I will not run as an independent. I want to win as the Republican. I want to run as the Republican nominee.

Those who have left to seek entry under this new system - and it will be an efficient system - will not be awarded surplus visas, but will have to apply for entry under the immigration caps or limits that will be established in the future.