I think that if you believe in regime change, you're mistaken. In 2013, we put 600 tons of weapons - us, Saudi Arabia, and Qatar - into the war against [Bashar] Assad. By pushing Assad back, we did create a safe space.

When you couple this militarization of law enforcement with an erosion of civil liberties and due process that allows the police to become judge and jury - national security letters, no-knock searches, broad general warrants, pre-conviction forfeiture - we begin to have a very serious problem on our hands.

The 11 million, I think, are never going home, don't need to be sent home, and I would incorporate them into our society by giving them work visas and making them taxpayers.

Any time someone tries to tell you that metadata is 'meaningless, don't worry, it's just who you call, it's just phone records, it's not a big deal' - realize we kill people based on metadata. So they must be pretty darn certain that they think they know something based on metadata.

If our freedom is taken, the American dream will wither and die.

The main thing I say on war is that we need to obey the law and formally declare war.

, I'm going to reserve judgment on [Rex] Tillerson. But I'll ask him the same question I've asked the others: do you understand the historic lesson that the Iraq war was a failure, a strategic mistake, that's what Donald Trump says.