

I don’t think it’s within other countries capabilities (Israel maybe, but why would they), nor in their intrest.
In some failed states it’s considerably easier to have certain people eliminated (and for sure has happened many many times).
Current USA is an internal affair with external effects. Other countries can’t do anything, that’s what happens when 1 country has the very biggest strongest military and security machine ever (way bigger than any competitor, no country get near). Even if they’ld want to, there is no way. And the current situation is unpredicatble and not stable, it would become even less predictable and less stable when certain people were to be assassinated.
If assassinations happen in the trump admin in the near future, I think it would more likely come from USA security services internally. Not sure if it’s for the better. Decent chance in that case of civil war type scenarios tbh.
There’s a nice documentary about it: https://www.themoviedb.org/movie/392011-kedi