It's critical how we want to use these spy programs, these electronic capabilities, where we want to draw the line, and who should approve these programs, these decisions, and at what level, for engaging in operations that could lead us as a nation into a war.

I don't want to live in a society that does these sort of things.

You would be surprised how effective, at least for influencing low-information voters, negative propaganda about me is.

There have been times throughout American history where what is right is not the same as what is legal. Sometimes to do the right thing you have to break the law.

A different [Ronald] Reagan-era authority: EO 12333, an executive order for foreign-intelligence collection, as opposed to the ones we now use domestically. So this one isn't even authorized by law. It's just an old-ass piece of paper with Reagan's signature on it, which has been updated a couple times since then. So what happened was that all of a sudden these massive, behemoth companies realized their data centers - sending hundreds of millions of people's communications back and forth every day - were completely unprotected, electronically naked.

I'm not an anarchist. I'm not saying, "Burn it to the ground."

A zero-day exploit is a method of hacking a system. It's sort of a vulnerability that has an exploit written for it, sort of a key and a lock that go together to a given software package. It could be an internet web server. It could be Microsoft Office. It could be Adobe Reader or it could be Facebook.