My understanding is the USA executive is an obscenely powerful position by the standard of the rest of the Western world and they can also delegate that power to accomplish specific objectives.

Is this a coup of Musk against Trump or the executive doing things its not allowed to do or a coup of the executive against the legislature?

(Maybe tabooing (in the rationalist sense) the word "coup" might help...)

Aside: the article paints a very concerning picture about the consequences of contemptuous ignorant imposition of abrupt blanket rules on valuable complex systems. I thank the OP for posting it.