[sylware]

That said, it seems the desktop/server high performance implementations are from SiFive in the US.

The main obvious reason is to dodge global IP issues with arm or x86*.

Trump is probably aware that "Big Tech" is a domestic issue (cr*ping the world, won't help to make america great again...). And he is right to push hard on the silicon, but "cleaning up" what's on top of it... ooooof!