In the campaign back in 2007, 2008, people would say, "Oh, he's being naïve. He thinks that there's no red states and blue states. And wait 'til he gets here." And I will confess that, I didn't fully appreciate the ways in which individual senators or members of Congress now are pushed to the extremes by their voter bases. I did not expect, particularly in the midst of crisis, just how severe that partisanship would be.

I don`t know if Donald Trump`s ever been to an actual polling place, but, you know, he doesn`t even worry if what he says is true. This is just about him worried that he`s losing.

Today we're seeing that climate change is about more than a few unseasonably mild winters or hot summers. It's about the chain of natural catastrophes and devastating weather patterns that global warming is beginning to set off around the world.. the frequency and intensity of which are breaking records thousands of years old.

If war explodes in Sudan, it could have a destabilizing effect that creates more space for terrorist activity that could eventually be directed at our homeland.

Our alliance with our NATO partners has been a cornerstone of U.S. foreign policy for nearly 70 years, in good times and in bad and through presidents of both parties because the United States has a fundamental interest in Europe's stability and security.

The degree of polarization that currently exists in Washington is such where I think it's fair to say if I presented a cure for cancer, getting legislation passed to move that forward would be a nail-biter.

That applies, by the way, even to some of the folks who are now [Donald] Trump supporters. They're responding to a fictional character named Barack Obama who they see on Fox News or who they hear about through Rush Limbaugh.