That's one of the first things I noticed with his previous try; For all of Obamas flaws, it at least seemed that everything was thought through with lawyers in the loop to make sure the execitive orders had a reasonable chance of surviving a legal challenge.
And then this clown comes along and gives the impression that he handed someone a post-it that said "no moar muzleems!!!111one"
Challenged in court? The bloody dude was announced above the law BY THE SUPREME COURT. As long as he OFFICIALLY kills all opposition, he's got a full green light on everything. The only thing stopping him will be military officers refusing orders that are too fucking outlandish. Tho I doubt the police will care too much.
Immunizing Trump as an individual from prosecution related to acts performed as President, while deeply problematic, will not prevent legal challengs his EO's. Striking down a president's EO is completely different than convicting a president with a crime.
I don't really see the difference, considering he can just lock anybody who opposes him up. People are already bending over for him out of fear, people that used to be critical of him. Challenging him will take some serious balls facing a suicide mission.
Considering how much time it took Obamas orders to even get to the Supreme Court, it can be as biased as he wants it: There's no way they'll get through all of it in a timely manner. Plus, there are still state courts.