Normally a president can't do that, but Trump controls all three branches, so he can indeed just order his Supreme Court cronies to fix this. Of course he can also just order anyone he doesn't like executed.
I feel like this fact isn't talked about enough. The supreme court gave the president immunity from prosecution in the most be decision ever. That alone should've been enough to kill his political career in the land of the free but his supporters are way too far up his ass to see the truth.