Competition breeds excellence, including in the GOP race.

The most important thing about global warming is this. Whether humans are responsible for the bulk of climate change is going to be left to the scientists, but it's all of our responsibility to leave this planet in better shape for the future generations than we found it.

He spent more time on the road to Damascus than a Syrian camel driver. And we thought nobody could fill John Kerry's flip-flops! ... [Romney's record was] anything but conservative until he changed all the light bulbs in his chandelier in time to run for President.

The fact is there are a lot of things happening at the federal level that are absolutely beyond the jurisdiction of the Constitution. This is power that should be shifted back to the states.

We had so many different presidents, including Jefferson, Jackson, Lincoln - there were other founders like Hamilton, Adams - who made it very clear that the courts can't make a law. The Constitution is expressly clear that that's a power reserved to Congress.

I'm not ashamed of the things I believe and why I believe them.

I want to say with the utmost of sincerity, not as a Republican, but as an American, that I have great respect for Senator Obama's historic achievement to become his party's nominee, not because of his color, but with indifference to it.