Local and state governments have outrun the federal government. The EPA has served notice that it will enact a rule requiring CO2 reductions by major emitters in the absence of major legislation. But it's a blunt instrument that is a little more difficult to use than a legislative remedy.

The presidency is more than a popularity contest.

I have absolutely no plans and no expectations of ever being a candidate again.

In a time of darkness, you don't curse the darkness, you light a candle.

American democracy is in grave danger from the changes in the environment in which ideas either live and spread or wither and die.

The oil industry has outpaced the building of a public consensus of the implications of climate science.

The rule of reason is the true sovereign in the American system.