Aside from the constitution being flawed and totally not a religious document as some idiots believe, the Congress is the most powerful branch of government. This co-equal BS is like saying apples and oranges are equal.
The congress writes the laws; which is the greatest power and that is why so many people share that power. The "CEO" only can execute those laws; not rewrite them or interpret them. It's supposed to be a much weaker position and still a design flaw that other governments improved with ministers. The courts settle misinterpretations (2nd most powerful, split over multiple people;) especially, intentionally stupid interpretations - they can't invent new laws. If they do, congress can clarify with new law and if they get ridiculously corrupt, they get fired by congress. If the "CEO" gets out of line, they can fire the president too; being like the board of directors.
The "CEO" doesn't have invented powers beyond the rules or even the policies and it doesn't matter what a corrupt court says because the "board" can fire them all at will with only the "shareholders" to keep them in check at elections... when the system works and the voters are not too gullible. Which they are.
Trump may as well start firing congressional staffers too; since he ignores all the laws anyway. I bet the GOP won't even push back if he fires all their staff...