So why did Bush decide to support the Energy bill, despite its increasing the fuel efficiency standards slightly? So that the next day, his administration could announce it is - for the first time ever - rejecting state applications to set their own higher standards.
The Bush administration sided with automakers yesterday, thwarting a California law to regulate tailpipe emissions as part of an aggressive campaign to slow global warming.
The ruling by the U.S. Environmental Protection Agency is a setback for California and more than a dozen other states planning to limit greenhouse gas emissions from vehicles.
The federal government had never before blocked California's efforts to enact tougher air quality rules.