I don't care about Musk personally but if you think Trump's threat is the first direct named threat against his company by a politician, I think you are off your rocker
By most accounts, that's what typically happens to businessmen who have close ties to the Russian Federation. Doubly so if you spent your early 20s on a traipse around post-bloc oblasts looking to buy decommissioned weapon systems. Triply so if you're still picking up when Putin calls you.
If it's any consolation though, Elon's not alone. Plus, he's probably earned a real nice dacha near occupied Sumy for the valuable work he's done the government.