In a move that would boost water deliveries to San Joaquin Valley agriculture and Southern California cities, federal fishery agencies are weakening decade-old endangered species protections for some of the state’s most imperiled native fish populations.

The rollback — coming a year after President Trump targeted the regulations in a memo — rewards Central Valley agribusiness interests that are some of the president’s strongest California supporters. To critics, it highlights the extent to which the Trump administration has injected politics into federal oversight of the nation’s leading environmental laws.