Even before he was sworn into office, Gov. Gavin Newsom threw his weight behind a series of tentative deals, brokered by his predecessor, that were intended to bring lasting peace to California’s never-ending battles over water and endangered fish.

The deals, designed to reallocate water from the state’s major rivers, have yet to be finalized a year later.

Now, one of the nation’s most powerful farm irrigation districts says it will back out of the agreements completely if Newsom follows through with a pledge to sue President Donald Trump over a federal plan to pump more water to farmers from the Sacramento-San Joaquin Delta, the fragile estuary on Sacramento’s doorstep.