I think that Donald Rumsfeld will go down in history as one of the worst secretaries of defense in history. We are paying a very heavy price for the mismanagement - that's the kindest word I can give you - of Donald Rumsfeld, of this war.

For decades we have been living lives of abundance, with little regard for our natural resources or global health. But we are now facing hard choices in our energy policy. Future generations - my children and grandchildren, along with yours - will have to live with the decisions we make today. And so it is time for us to make some tough and - hopefully - smart choices regarding our energy use and production before it is too late.

My preference would be to remain in the Senate, ... But you can't say I would refuse to serve in one of those (Cabinet) capacities. It's not the same as vice president.

It's a matter of fact that Senator Obama has spent more money on negative ads than any political campaign in history.

There's going to be other wars. I'm sorry to tell you, there's going to be other wars. We will never surrender, but there will be other wars.

I don't doubt the sincerity of my Democratic friends. And they should not doubt ours.

I think where [Donald Trump] loses most hawkish republicans is when he talking about how much he likes [Vladimir] Putin. That should make any person who believe in the American exceptionalism, incredibly uncomfortable.