I'm going to be a president who believes in science.

The hope is there. The sun is rising. Our best days are yet to come.

Mitt Romney says he believes in America and that he will restore American exceptionalism. I have news for him, we already have an exceptional American as president and we believe in Barack Obama.

I figured out Karl Rove's political strategy -- make gas so expensive, no Democrats can afford to go to the polls.

Just the fact that we can't pass budgets in our Congress, just the fact that we are gridlocked in our own democracy, the fact that everybody who travels can see that we're not investing in our airports, in our rail, in our infrastructure and so forth, people are noticing a United States that is not getting the job done in some ways.

And whatever our faith - whatever our faith, one belief should bind us all: The measure of our character is our willingness to give of ourselves for others and for our country.

America must always be the world's paramount military power. But we can magnify our power through alliances.