California Attorney General Rob Bonta and Colorado Attorney General Phil Weiser co-led a coalition of 18 states and the District of Columbia in filing a Supreme Court brief supporting Boulder’s climate lawsuit against American energy companies.

But Weiser did more than lend Colorado’s name to another state’s filing. His office led the charge as a Colorado deputy solicitor general serves as counsel of record, and the coalition is asking the Supreme Court either to dismiss the appeal or affirm the ruling that allows Boulder’s claims to continue. That is an affirmative effort to keep the lawsuit alive.

Yet the filing leaves a basic question unresolved: Does Weiser merely believe Boulder should be allowed to pursue its claims in state court, or does he actually endorse the merits of the claims in the case?

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