The Endangered Species Act (ESA) regulations promulgated by the Trump administration (Trump ESA Rules) were challenged by environmental groups. While that challenge was pending, the Biden administration announced that those regulations would be revised. On July 5, the U.S. District Court for the Northern District of California vacated the Trump ESA regulations, not on the merits of the regulations but because they are in the process of being rewritten. This decision disregards the Biden administration’s request that the regulations remain in effect to preserve consistency and order during the revision process. Instead, the pre-Trump regulations (which were issued in the mid-1980s) have been reinstated and are now in effect until the U.S. Fish and Wildlife Service (USFWS) and National Marine Fisheries Service (NMFS) (collectively, the Services) finalize new regulations.