A three-judge panel of the U.S. Court of Appeals for the Second Circuit on Friday considered whether federal or state courts should hear Connecticut’s lawsuit against Exxon Mobil for violating its unfair trade practices act in its advertising about the environmental effects of fossil fuels.

Paul, Weiss, Rifkind, Wharton & Garrison partner Kannon Shanmugam began by arguing that the panel should vacate a ruling by U.S. District Judge Janet Hall of the District of Connecticut that granted a motion by state Attorney General William Tong’s office to remand the case to state court, because the case has similarities to the Second Circuit’s 2021 ruling in City of New York v. Chevron.