It's important to listen to what scientists have to say, even when it's inconvenient, especially when it's inconvenient

The capacity of Iraq's security forces has improved, and Iraq's leaders have made strides toward political accommodation

That is the true genius of America, a faith in the simple dreams of its people, the insistence on small miracles. That we can say what we think, write what we think, without hearing a sudden knock on the door. That we can have an idea and start our own business without paying a bribe or hearing a sudden knock on the door. That we can participate in the political process without fear of retribution, and that our votes will be counted.

I agree with the basic principle that anybody who wants to serve in our armed forces and make sacrifices on our behalf, on behalf of our national security, anybody should be able to serve. And they shouldn't have to lie about who they are in order to serve.

My powers of empathy, my ability to reach into another's heart, cannot penetrate the blank stares of those who would murder innocents with abstract, serene satisfaction.

I do think that I am generally optimistic.

You bomb ISIL. You're not trying to bomb innocent people. And that requires intelligence and confidence in our military to be able to develop the kinds of targets that we need. We're already doing Special Forces, who are going to help us gather that intelligence and help advise and assist and train local forces so that they can go after ISIL in areas like Raqqah and Mosul.