From the NYT:

President Obama on Monday will direct federal regulators to move swiftly to grant California and 13 other states the right to set strict automobile emissions and fuel efficiency standards, two administration officials said Sunday evening.

The directive makes good on an Obama campaign pledge and marks a sharp reversal from Bush administration policy. Granting California and the other states the right to regulate tailpipe emissions is one of the most dramatic actions Mr. Obama can take to quickly put his stamp on environmental policy.

Take that, Stephen Johnson.