Immigration is the most difficult issue I've ever dealt with, and I've dealt with some tough issues: drones, gays in the military, WikiLeaks, Guantanamo. But immigration is hardest because there are so few people willing to talk and build consensus. Everybody's firmly made up their mind. It's a polarized issue.

Under well-settled legal principles, lethal force against a valid military objective, in an armed conflict, is consistent with the law of war and does not, by definition, constitute an 'assassination.'

In my view, targeted lethal force is at its least controversial when it is on its strongest, most traditional legal foundation. The essential mission of the U.S. military is to capture or kill an enemy. Armies have been doing this for thousands of years. As part of a congressionally authorized armed conflict, the foundation is even stronger.

How could somebody be comfortable with authorizing legally the use of lethal force? My view is if you become comfortable with it, then you should get out of the job.

You can't win with some people. If you're not in government, you're criticised for being not serious. If you are in government, you're criticised for wanting power. That's the Labour party's line of attack, and it's a bit ridiculous.

Cleopatra was on a political mission to save her country and her power, but what we remember about her are these two famed seductions, which are a matter of politics, not a matter of love.

We didn't have to use technology to build a surveillance state.

I live with myself. I wake up with myself, I eat, and I take a dump with myself. I don't see anything special there. I do all the same things other human beings and creatures do. I don't see any need to be telling the data of the day of this particular human being by posting it on online. It's not interesting to me.