We can lose so much of what we've gained in terms of the kind of democratic freedoms and market-based economies and prosperity that we've come to take for granted.

Our campaign was not hatched in the halls of Washington -- it began in the backyards of Des Moines and the living rooms of Concord and the front porches of Charleston. ...This is your victory.

We consume about 25 percent of the world's oil. We only have 2 percent of the reserves.

Today, we are closer to fulfilling America's promise of economic and social justice because we stand on the shoulders of giants like Dr. King, yet our future progress will depend on how we prepare our next generation of leaders. We must fortify their ladders of opportunity by correcting social injustice, breaking the cycle of poverty in struggling communities, and reinvesting in our schools. Education can unlock a child's potential and remains our strongest weapon against injustice and inequality.

You can choose a future where more Americans have the chance to gain the skills they need to compete, no matter how old they are or how much money they have. Education was the gateway to opportunity for me. It was the gateway for Michelle. And now more than ever, it is the gateway to a middle-class life.

I believe that marriage is the union between a man and a woman. Now, for me as a Christian - for me - for me as a Christian, it is also a sacred union. God's in the mix.

I'm a strong believer in strong encryption.