A lot of people have said to me, 'That's a great idea, running for president. You'll get booked for more speeches. You can write a book.'

The only thing that will stop Iran from getting nuclear weapons is regime change in Tehran.

Our biggest national security crisis is Barack Obama.

The European Union can now act like a major power, at least that is what the European Union tells us.

If a prosecutor in The Hague decides that the U.S. has not followed through effectively on an investigation - is unwilling or unable to carry it through - then that person, that prosecutor, in an unreviewable fashion gets to second-guess the United States? That is unacceptable. That is an assertion of authority over and above the U.S. Constitution.

The Republican Party is the party of national security. There's hardly a national security wing of the Democratic Party anymore. So if we turn away from it, that'll be a big problem.

Iran has essentially mastered all of the complex science and technology that they need to have a completely indigenous nuclear weapons program. That means that our options on Iran are extremely limited, to regime change or as a last resort, the use of force.