All across the world, ...increasingly dangerous weather patterns and devastating storms are abruptly putting an end to the long-running debate over whether or not climate change is real. Not only is it real, it's here, and its effects are giving rise to a frighteningly new global phenomenon: the man-made natural disaster.

On issues like Ukraine, on issues like Syria, we've had very significant differences [with Russia].

Sometimes slow, steady effort is rewarded with justice that arrives like a thunderbolt.

While we may not live to see the full realization of our ambition, we will have the satisfaction of knowing that the world we leave to our children will be better off for what we did.

In that kind of environment, where there's so much skepticism about information that's coming in, we're gonna have to spend a lot more time thinking about how do we protect our democratic process.

The fact that my 15 minutes of fame has extended a little longer than 15 minutes is somewhat surprising to me, and a matter of bewilderment for my wife.

When our sailors in the Persian Gulf accidentally strayed into Iranian waters, that could have sparked a major international incident. Some folks here in Washington rushed to declare that it was the start of another hostage crisis. Instead, we worked directly with the Iranian government and secured the release of our sailors in less than 24 hours.