The worst things in history have happened when people stop thinking for themselves, especially when they allow themselves to be influenced by negative people. That's what gives rise to dictators. Avoid that at all costs. Stop it first on a personal level, and you will have contributed to world sanity as well as your own.

The Chinese are not stupid people. They're very smart people. They told me very, very distinctly that they cannot believe how stupid our representatives are in the United States. They cannot believe that they can continue to take all our jobs - you know, through the manipulation of the currency, of their currency, they make it almost impossible for our great companies to compete.

The people that we're allowing into our country, we are allowing people into our country that are going to cause us tremendous problems. This isn't a question of will it happen; this a question of when.

Historically black colleges and universities are incredibly important institutions woven into the fabric of America. They have played such an important role in achieving progress for African Americans and in our nation's march for justice.

America is in big trouble. We don't win anymore. We lose to China. We lose to Mexico both in trade and at the border. We lose to everybody.

We have a movement going on, folks. I will never let you down.

The secretary of Homeland Security working with myself and my staff will begin immediate construction of a border wall.