EPA tailpipe rules

The Car Rule and the Major Questions Doctrine

Claims that the new rule violates the doctrine are groundless.

Ever since the Supreme Court decided West Virginia v. EPA, conservatives and industry interests have claimed that just about every new regulation violates the major question doctrine. When the Biden Administration ramped up fuel efficiency requirements through 2026, ideologues such as the Heartland Institute and states like Texas were quick to wheel out this attack. …

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