I believe that what I've worked for - women and children, civil rights against poverty, trying to level the playing field for people to have a better chance - is what I still believe is important and what I'm trying to do today.

That is the number-one threat we face in the world. And it becomes particularly threatening if terrorists ever get their hands on any nuclear material. So a man who can be provoked by a tweet should not have his fingers anywhere near the nuclear codes, as far as I think anyone with any sense about this should be concerned.

I'm going to use the White House and every tool at my disposal as your president to make the case that patriotism is profitable.

Prediction from a grown-up: Your future is going to be amazing. You will surprise yourself with what you're capable of and the incredible things you go on to do. Find the people who love and believe in you - there will be lots of them.

It's important to recognize the vital role that the financial markets play in our economy and that so many of you are contributing to. To function effectively those markets and the men and women who shape them have to command trust and confidence, because we all rely on the market's transparency and integrity. So even if it may not be 100 percent true, if the perception is that somehow the game is rigged, that should be a problem for all of us, and we have to be willing to make that absolutely clear.

We have to face up to systemic racism. We see it in jobs, we see it in education, we see it in housing. But let's be really clear; it's a big part of what we're facing in the criminal justice system.

I don't think the police, even if we train them, can be, you know, as good as psychologists and psychiatrists and others knowing what is happening to somebody. So we've got to have a more coherent, comprehensive approach.