Bill Clinton: “The tragic shooting last year in Columbine High School showed us what happens when guns fall into the wrong hands.”

We need immigrants that have been vetted to do work.

Diverse groups make better decisions than homogenous ones do.

I don't think any person with a straight face can tell you that Katrina was caused by global warming. But what we do know, what the evidence shows, is that there is an increase in the number and severity of bad weather events all across…

And I think we are facing challenges today without precedent in our history.