Over the weekend, the New York Times published a story on conservative legal challenges to greenhouse gas regulations and other environmental regulations, pinned to West Virginia v. EPA. The story noted that conservative groups and their allies raise money from conservative sources and push for conservative goals, such as greater legal constraints on federal regulation, and that the WVA v. EPA case could well deliver on these goals.
The story notes that Republican Attorneys General have filed a range of lawsuits challenging greenhouse gas regulations, some of which are pending in lower courts, including the U.S. Courts of Appeals for the D.C. Circuit, about which the NYT writes:
At least two climate cases are pending before the United States Court of Appeals for the D.C. Circuit, which has eight judges appointed by Democratic presidents, nine judges chosen by Republicans, including three Trump appointees, and one vacancy.