When I talked to [Donald Trump] about - our intelligence agencies, what I've said to him is - is that there are gonna be times where you've got raw intelligence that comes in and in my experience, over eight years, the intelligence community is pretty good about saying, "Look, we can't say for certain what this means." But there are gonna be times where the only way you can make a good decision is if you have confidence that the process is working, and the people that you put in charge are giving you their very best assessments.

The best way to not feel hopeless is to get up and do something.

We can't change the way Washington works unless we first change how Congress works.

I think that there is a particular mindset that was on display in the run-up to the Iraq war that continues to this day. Some of the folks who were involved in that decision either don't remember what they said or are entirely unapologetic about the results, but that views the Middle East as a place where force and intimidation will deliver on the security interests that we have, and that it is not possible for us to at least test the possibility of diplomacy.

Cynicism is a sorry kind of wisdom.

Climate change is one of the issues I worry most about because its impacts are enormous. But they're gradual, they're not immediate.

I'm going to tell the American people what I believe will make this country great.