During a historic gathering in Saudi Arabia, I called on the leaders of more than 50 Muslim nations to join together to drive out the menace which threatens all of humanity. We must stand united against shared enemies to strip them of their territory and their funding, and their networks, and any form of ideological support that they may have. While we will always welcome new citizens who share our values and love our people, our borders will always be closed to terrorism and extremism of any kind.

National security begins with border security. Foreign terrorists will not be able to strike America if they cannot get into our country.

Look, again, I'm competing against professional politicians, senators, top of the line. I know Ben Carson is still in, and he's a terrific guy and a talented guy. And so I'm competing against a lot of very good people.

I just want everybody to understand and fully know that the United States of America stands behind Japan, its great ally, 100 percent.

According to federal data, there are at least 2 million, 2 million, think of it, criminal aliens now inside of our country, 2 million people criminal aliens. We will begin moving them out day one. As soon as I take office.

Learning to expect problems saved me from a lot of wasted energy. Winners see problems as just another way to prove themselves.

I have a son. He's 10 years old. He has computers. He is so good with these computers, it's unbelievable. The security aspect of cyber is very, very tough. And maybe it's hardly doable.But I will say, we are not doing the job we should be doing. But that's true throughout our whole governmental society.