Americans coming home, an Iran that has rolled back its nuclear program and accepted unprecedented monitoring of the program -these things are a reminder of what we can achieve when we lead with strength and with wisdom, with courage and resolve and patience. America can do and has done big things when we work together.

To the extent that our political dialogue is such where everything is under suspicion, everybody is corrupt and everybody is doing things for partisan reasons, and all of our institutions are full of malevolent actors - if that's the storyline that's being put out there by whatever party is out of power, then when a foreign government introduces that same argument with facts that are made up, voters who have been listening to that stuff for years, who have been getting that stuff every day from talk radio or other venues, they're going to believe it.

I don't have to negotiate an arms agreement with Great Britain or with France.

In November [2016], Americans are gonna have to make a decision about what we care about and who we are. We get these spasms of politics around immigration and fearmongering and then our traditions and our history and our better impulses kick in. That's how we all ended up here. 'Cause I guarantee you at some point every one of us has somebody in our background who people didn't want coming here. And yet here we are.

The biggest threat that we face right now is not a nuclear missile coming over the skies. It's in a suitcase. This is why the issue of nuclear proliferation is so important. It is the - the biggest threat to the United States is a terrorist getting their hands on nuclear weapons.

If we are not serious about facts and what's true and what's not. And particularly in an age of social media where so many people are getting their information in sound bites and snippets off their phones, if we can't discriminate between serious arguments and propaganda, then we have problems.

When it comes to immigration, I have actually put more money, under my administration, into border security than any other administration previously. We've got more security resources at the border - more National Guard, more border guards, you name it - than the previous administration. So we've ramped up significantly the issue of border security.