George W. Bush: “He's going to continue my administration's effort to conserve our land and water and air resources.”

You've showed the great strength of America through your work—and that is your good heart.

Is it in our national interests that 25 million people who would have died now live? I think it is, and so do you.

History will remember him as among the finest public servants of his generation – a patriot who brought integrity, high intelligence, and seriousness of purpose to every position.

We are heartbroken by the loss of life and the agony so many are feeling.