I believe we can do much more to adapt to the structural changes in the global economy, get high-end manufacturing back here, set up clusters of economic activity where you have, among other things, continuous retraining of people well into their middle years so they never become irrelevant to the current job market.

Through scientific discovery and technological innovation, we enlist the forces of the natural world to solve many of the uniquely human problems we face - feeding and providing energy to agrowing population, improving human health, taking responsibility for protecting the environment and the global ecosystem, and ensuring our own Nation's security. Scientific discoveries inspire and enrich us, teaching us about the mysteries of life and the nature of the world.

The more children see of violence, the more numb they are to the deadly consequences of violence. Now, video games like 'Mortal Kombat,' 'Killer Instinct,' and 'Doom,' the very game played obsessively by the two young men who ended so many lives in Littleton, make our children more active participants in simulated violence.

If you want to live like a Republican, vote like a Democrat.

To build a twenty-first-century economy, America must revive a nineteenth-century habit--investing in the common, national economic resources that enable every person and every firm to create wealth and value.

We have a chance here to prove that [Rwanda], a country that almost slaughtered itself out of existence, can practice reconciliation, reorganize itself, focus on tomorrow and provide comprehensive, quality health care with minimal outside help.

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.