For now, decisions are upon us and we cannot afford delay. We cannot mistake absolutism for principle or substitute spectacle for politics, or treat name-calling as reasoned debate.

And to those nations like ours that enjoy relative plenty, we say we can no longer afford indifference to the suffering outside our borders; nor can we consume the world's resources without regard to effect. For the world has changed, and we must change with it.

Part of what's unique about climate change, though, is the nature of some of the opposition to action. It's pretty rare that you'll encounter somebody who says the problem you're trying to solve simply doesn't exist. When President Kennedy set us on a course for the moon, there were a number of people who made a serious case that it wouldn't be worth it; it was going to be too expensive, it was going to be too hard, it would take too long. But nobody ignored the science. I don't remember anybody saying that the moon wasn't there or that it was made of cheese.

I can make a firm pledge, under my plan, no family making less than $250,000 a year will see any form of tax increase. Not your income tax, not your payroll tax, not your capital gains taxes, not any of your taxes.

Each side has legitimate aspirations - and that's part of what makes peace so hard. And the deadlock will only be broken when each side learns to stand in the other's shoes; each side can see the world through the other's eyes. That's what we should be encouraging. That's what we should be promoting.

I think we've done a pretty good job staying in touch with the American people. But at a certain point you can't help but lose some feel for what's on the ground because you're not on the ground.

America is a nation of immigrants. And so the question is, how do we make legal immigration faster, less bureaucratic, cut the red tape?