Obama Argues He's Done More to Fight Terrorism Than Other Presidents

"This is somebody who has served her country for four years as secretary of state, and did an outstanding job. And no one has suggested that in some ways, as a consequence of how she's handled e-mails, that that detracted from her excellent ability to carry out her duties," Obama said.

He guaranteed Clinton wouldn't not be protected by the White House in the FBI probe -- "not because I give Attorney General Lynch a directive; that is institutionally how we have always operated."

"I do not talk to the Attorney General about pending investigations. I do not talk to FBI directors about pending investigations. We have a strict line, and always have maintained it... I guarantee it."

Pressed on whether that guarantee holds if Clinton is the Democratic Party nominee for president, Obama fired back, "How many times do I have to say it, Chris? Guaranteed."

Obama also reminisced upon his time in office. His greatest achievement? "Saving the economy from a great depression." His worst mistake? "Probably failing to plan for the day after what I think was the right thing to do in intervening in Libya."