You should check out what the supreme court ruled on for presidential immunity recently. He could tell the military (core presidential power) to put a bullet in literally anyone for any reason because the motives behind any core presidential power action cannot be questioned. Then just to make sure the people who actually do it don’t get in trouble for murder, he could use another presidential power to pardon them premtively.
The funny thing is that the Republican appointed judges ruled that way because Trump is struggling in court.
I learned binary math in college. I can prove 1+1=1