Yes, the slow ramp of anti Wikipedia rhetoric is a documented fact, in both Russia and the USA: https://gizmodo.com/trump-doj-threatens-wikipedias-nonprofit...
I don't see any evidence of that. It's just more legal attacks just like there have always been. Wikipedia has plenty of money to defend itself, and can always move resources between countries.
I don't see anything new going on. It may be new in the US, but it's also merely one government official who sent one letter, and any legal challenge there is incredibly unlikely to succeed in the courts.