The Trump administration and California officials have sued each other, swapped insults on Twitter and clashed on everything from climate change to immigration.

But threatening someone with jail time? That might be a new one.

The threats came in a dispute over reintroducing winter-run Chinook salmon into the McCloud River, a pristine river above Shasta Dam, as part of a federal plan approved under the Obama administration to try to stave off extinction for the critically endangered fish.