Many states and even many people who are in support of the death penalty question their support of the death penalty because of the imperfection of our courts. Through DNA testing, we don't always get it right, even with that.

To understand how Republicans lost the African American vote, we must first understand how we won the African American vote.

I think we need to get to the bottom of it. And I think there should be an investigation [of hackers attacks] because in order to defend ourselves against other adversarial countries, we have to protect our information.

I don't care if you're a Republican or a Democrat, there is something profoundly un-American about using the brute force of government to bully someone.

When we toppled [Muammar] Gadhafi in Libya, I think that was a mistake. I think ISIS grew stronger, we had a failed state, and we were more at risk.

I think those who have wanted regime [of Bashar Assad] change have made a mistake.

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