Electric Vehicles Take Spotlight in Arguments Over EPA Car Rules

Biden administration tailpipe emission rules may hinge on whether vehicle electrification technology is widely mandated in the new regulations, as the issue played a key role in judge’s questioning in arguments on Thursday.

An engaged panel at the US Court of Appeals for the District of Columbia Circuit spent more than two hours questioning four attorneys for fuel producers, states, and the federal government over the legal underpinnings of key vehicle climate rules in Texas v. EPA.

Among the biggest questions at play were whether petitioners meet the thresholds to even bring the case and whether the EPA is ...