Pessimism is an excuse for not trying and a guarantee to a personal failure.

President Obama started with a much weaker economy than I did. Listen to me, now. No president - no president, not me, not any of my predecessors, no one could have fully repaired all the damage that he found in just four years.

America can no longer afford to get the Nobel Prizes while our competitors get the profits.

If you think the President was right to open the doors of American opportunity to young immigrants brought here as children who want to go to college or serve in the military, you should vote for Barack Obama.

Constant conflict is actually often good politics. Because the more you can inflame your supporters the more likely they are to show up at election day. And if they're more inflamed than the other side, even if the other side has more people agreeing with it, you'll win, because your crowd will show up.

Without a high pain threshold, you can't be a successful President.

The world knows of Rosa Parks because of a single, simple act of dignity and courage that struck a lethal blow to the foundations of legal bigotry.