Those who deny the science or choose excuses over action are playing with fire.

I voted to threaten the use of force to make Saddam Hussein comply with the resolutions of the United Nations.

I think that all of the cyber attacks that are taking place, but particularly this - the Russian one, had a profound impact on the American system, on our political process, on our - it invaded the space of our election. The releasing on a regular basis of one party's stolen emails had an impact, and I think that other things also had an impact.

Just the fact that we can't pass budgets in our Congress, just the fact that we are gridlocked in our own democracy, the fact that everybody who travels can see that we're not investing in our airports, in our rail, in our infrastructure and so forth, people are noticing a United States that is not getting the job done in some ways.

I have confidence in my campaign. I have assembled a great team that is going to beat George W. Bush, and any rumors to the contrary are completely erroneous.

I think as we celebrate the 70th anniversary of the UN, it's a good moment to rekindle our efforts to make multilateralism work yet again. And I'm proud to say that in the Iran agreement I think we did show that it can work.

What we do right now, today, matters.