When people make the mistake of underestimating me, that's when they are really in for their biggest surprise.

If you look at Caterpillar now [in Japan] with what's going on. [Shinzō] Abe is a great leader. Who is our chief negotiator? Essentially it is Caroline Kennedy. I mean give me a break. She doesn't even know she's alive. It's Caroline Kennedy. So Caterpillar is having a hard time selling because Komatsu is under-cutting them.

The Davis-Oliver bill will enhance cooperation with state and local authorities to ensure that criminal immigrants and terrorists are swiftly, really swiftly, identified and removed.

I have a temperament where I know how to win. Hillary Clinton doesn't know how to win.

As a cornerstone of my policy, we will substantially expand public-private partnerships to maximize the amount of investment and funding that is available for space exploration and development.

In a Donald Trump administration, all immigration laws will be enforced. As with any law enforcement activity, we will set priorities. But unlike Barack Obama administration, no one will be immune or exempt from enforcement.

As president, I could run the Trump organization, great, great company, and I could run the company - the country. I'd do a very good job, but I don't want to do that.