That is the difference we make in the world. And our own safety, our own security, depends upon our willingness to do what it takes to defend this nation and uphold the values that we stand for - timeless ideals that will endure long after those who offer only hate and destruction have been vanquished from the Earth.

We live in a culture that discourages empathy. A culture that too often tells us our principle goal in life is to be rich, thin, young, famous, safe, and entertained.

I've always viewed the Paris Agreement as a starting point. If you look at all the commitments that have been made by all the countries, it's still not sufficient to deal with the very dangerous situation we face. What it has done is that it created an architecture whereby as technology improves, as we find new clean sources of energy, as we make our economies more efficient, then gradually we can turn up the dial and improve the outcomes of Paris.

What has made America the wealthiest, most successful country on Earth historically has been our commitment to education.

Before we get too depressed about the state of our politics, let's remember our history ..... Many forms of Government have been tried, and will be tried in this world of sin and woe. What is amazing, is that despite all the conflict, our experiment in democracy has worked better than any form of government on earth

The Cold War has been over for a long time. I'm not interested in having battles that, frankly, started before I was born.

Today, about 40 percent of America's carbon pollution comes from our power plants. There are no federal limits to the amount those plants can pump into the air. None. We limit the amount of toxic chemicals like mercury, and sulfur, and arsenic in our air and water, but power plants can dump as much carbon pollution into our atmosphere as they want. It's not smart, it's not right, it's not safe, and I determined it needs to stop.