Conservation groups, joined by former President Carter, had sued to reopen the case after a March ruling upheld an Interior Department deal for a road through a national wildlife refuge.
The controversial Mountain Valley Pipeline is one of several projects the senator has negotiated major concessions for, benefiting his financial supporters.
A Supreme Court ruling, combined with an energy crunch and intraparty politics, makes it nearly impossible for President Biden to achieve his climate goals.
A Supreme Court environmental case being decided this month is the product of a coordinated, multiyear strategy by Republican attorneys general and conservative allies.
