We are now at a point where because we in fact have been successful at stopping a number of plots, a threat has evolved. We do see these lone-wolf actors. We do see these encouragements for troubled individuals to pick up a gun and act out of this ideology.

The United States has to go through structural reforms in terms of improving our education system or revamping our infrastructure or, you know, looking at some regulations that weren't properly controlling excesses on Wall Street.

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.

I want every math teacher to know math. I want every science teacher to have expertise in science. I want them to know how to inspire and engage young people.

History doesn't always move in a straight line. Sometimes it zigs and zags.

The shift to a cleaner energy economy wont happen overnight, and it will require tough choices along the way. But the debate is settled. Climate change is a fact.

Excuses are tools of the incompetent used to build bridges to nowhere and monuments of nothingness