If you don't have a record to run on, you paint your opponent as someone to run from.

We, the people, still believe that our obligations as Americans are not just to ourselves, but to all posterity.

Cutting our education budget, that's not a smart choice. That will not help America compete with China.

My goal is to maintain the international norm on banning chemical weapons. I want that enforcement to be real. I want it to be serious. I want people to understand that gassing innocent people, delivering chemical weapons against children is not something we do. It's prohibited in active wars between countries. We certainly don't do it against kids. And we've got to stand up for that principle.

The pain I felt was my father's pain.

I think that Donald Trump is coming to this office with fewer set hard-and-fast policy prescriptions than a lot of other presidents might be arriving with.

The very technologies that empower us to do great good can also be used to undermine us and inflict great harm.