The United States Fish and Wildlife Service and the National Marine Fisheries Service (collectively, Services) proposed last week to rescind the regulatory definition of “harm” under the federal Endangered Species Act (ESA), sparking intense criticism from environmental advocacy groups. If finalized, the rescission would remove a longstanding protection for the habitat of wildlife species listed as threatened or endangered under the ESA, making regulatory compliance easier for many types of projects across the country. But it would also set up a potential collision between the current president’s deregulation efforts and one of several bills that California’s Legislature is considering as a way to compensate for potential “backsliding” of federal environmental protections, with the regulated community in California likely to be among the losers.