There's about 100 different cancers in a cancer cell. And so what we're finding out is, they're finding out ways to deal with one or two of the cancers there, with certain medicines. But they don't know why, if you have that cancer and I have that cancer, and I get the therapy and you get it, I don't live and you live. That - they don't know why.

Stop talking about how you care about people. Show me something. Show me a policy. Show me a policy where you take responsibility.

America's leaders have to find a way to work together, rise to the challenge, and come up with solutions as bold and visionary as the people of this nation.

It's presumptuous to say you know how somebody feels.

Look, freedom is an overwhelming American notion. The idea that we want to see the world, the peoples of the world free is something that all of us subscribe to.

Al Qaeda is almost all in Pakistan, and Pakistan has nuclear weapons. And yet for every dollar we're spending in Pakistan, we're spending $30 in Afghanistan. Does that make strategic sense?

We were never motorheads. We knew fast cars. We knew how to siphon gas - me - charge the battery when it was down. But never hot-wired a car.