The importance of making sure that the sense of accountability when, in fact, law enforcement is involved in a deadly shooting is something that I think communities across the board are going to need to consider, we have a great opportunity, coming out of some great conflict and tragedy, to really transform how we think about community law enforcement relations so that everybody feels safer and our law enforcement officers feel, rather than being embattled, feel fully supported.

I think the most important thing for the public and the press is to just listen to what Donald Trump says and follow up and ask questions about what appear to be either contradictory or uninformed or outright wacky ideas.

I'm always suspicious of politics dividing people instead of bringing them together.

We do not benefit from a relationship with China or any other country in which we put our values and our ideals aside.

America, we weaken our ties when we allow our political dialogue to become so corrosive that people of good character aren't even willing to enter into public service; so coarse with rancor that Americans with whom we disagree are seen not just as misguided but as malevolent. We weaken those ties when we define some of us as more American than others, when we write off the whole system as inevitably corrupt, and when we sit back and blame the leaders we elect without examining our own role in electing them.

I don't want my generals or my defense secretary or my national-security team to ever feel deploying weapons to kill people as routine or abstract, even if the targets are bad people.

America is not the crude stereotype of a self-interested empire. Given our interdependence, any world order that elevates one nation or group of people over another will inevitably fail.