There’s a lot of takes about how Biden couldn’t be prosecuted for sending SEAL Team Six after the Justices, which is true but would likely still be a crime for the SEALS to carry out.
What looks like couldn’t be prosecuted is Biden himself shooting them.
Under Trump v United States, he should appeal his libel case. He argued that his remarks were part of his official duties as President and according the ruling, courts cannot question his categorization. As an official act, It should be transferred to federal court and then dismissed.
And the President is commander in chief of the army and navy. If Biden declares them to be unlawful combatants, they're legal game. If the courts ok extrajudicial drone strikes on US citizens, and they have (Al-Aulaqi v. Panetta), it's very defensible that it's a legal military order.
Listen if we get a dystopian future where the President literally goes around icing dudes that is not the _worst_ dystopia that could come out of this election.