In Europe, where the terrorist threat is probably greatest at the moment, the amount of information-sharing that's been taking place, the effectiveness of law enforcement across borders gives us the ability to protect ourselves while still being true to the basic precepts of our liberal democracies. I hope that that continues, and it is something that I think we should be worried about.

I think Barack Obama 'll talk about the actions that we've taken, not just since 9/11, but since Paris, to help keep the American people and American interests safe.

Marco Rubio is one of those people. How does that work? How can you call him a con artist and dangerous, and object to all the controversial things he says, and then say, but I`m still going to vote for him? Come on, man.

Without a deal [with Iran], the international sanctions regime will unravel with little ability to reimpose them. With this deal, we have the possibility of peacefully resolving a major threat to regional and international security. Without a deal, we risk even more war in the Middle East and other countries in the region would feel compelled to pursue their own nuclear programs, threatening a nuclear arms race in the most volatile region in the world.

In terms of my conversations with [Vladimir] Putin, these are conversations that took place before the election. As I indicated, there has been very clear proof that they have engaged in cyber attacks. This isn't new. It's not unique to Russia. There are a number of states where we've seen low-level cyber attacks and industrial espionage and, you know, other behavior that we think should be out of bounds.

I'll be the first US president to not only visit Kenya and Ethiopia, but also to address the continent as a whole, building off the African summit that we did here which was historic and has, I think, deepened the kinds of already strong relationships that we have across the continent.

I believe, in the words of Dr. Martin Luther King Jr., that there is such a thing as being too late, and when it comes to climate change, that hour is almost upon us.