Barack Obama: “We have a responsibility to protect the health of our economy and environment.”

That's what I hope every visitor to this center takes away from their experience.

For almost four decades, Nancy Pelosi served the American people and worked to make our country better.

They're meant to remind us of who we can be, to remind us of what's possible, so we can forge ahead.

We’ve now fought a war, spent billions and billions of dollars, you know, put enormous strain on our military. A lot of people have died. And it feels like we’re back where we were before we started the war, except maybe a little bit worse…