Shoalwater Bay Indian Tribe v. Exxon Mobil Corp.

The federal district court for the Western District of Washington granted the Makah Indian Tribe’s and Shoalwater Bay Indian Tribe’s motions to remand their climate change cases against fossil fuel companies to state court. The court rejected arguments that there was federal jurisdiction based on complete preemption of the Tribes’ public nuisance and failure to warn claims by federal common law governing possessory land claims based on aboriginal title. The court concluded that even if federal common law could completely preempt certain state-law claims, the Tribes’ claims would not be completely preempted because they were “not in fact reducible to injury to land.” The court also found that the Tribes’ state-law claims did not necessarily raise substantial and actually disputed federal issues about tribal land rights or about whether the Tribes might recover tribal healthcare costs ultimately borne by the federal government. The court further found that exercising jurisdiction over the Tribes’ state-law claims would disrupt the congressionally approved balance of federal and state judicial responsibilities.