Good news, he cannot do this https://twitter.com/realDonaldTrump/status/1288818160389558273
It's still very not good he even suggested it, to be clear, but I think everyone commenting on this from a position of authority owes it to readers to make clear what is and is not possible. Part of being honest about the threats here is clarifying what is legally impossible
The fact that he literally cannot do what he is proposing is EXTREMELY RELEVANT to how journalists react to and describe this tweet (which is, again, a bad and dangerous tweet).
It's like the executive order on Section 230. Definitely bad! Also has no power to do what it's suggesting. That's important context.