Americans call this "separation of powers" for some quaint reason. In practice all three branches of government do what he says in executive orders.
Anytime a judge does something that might result in a confrontation SCOTUS sets it aside while the legal process continues ... this a farce as in the meantime people are fired, tax payer data is handled poorly, budgets are cut and everything falls apart. Effectively the law is ignored and the damage is allowed to happen regardless of the court outcome. It won't matter by the end of it all. It's the same as SCOTUS rubber stamp approving all of it...
IMO they've disqualified themselves for that job by simply refusing to do it.
Every traditional Republican ideology is now upside down / been violated with gusto.
They're a whole new party in many ways.
What's new is someone had the money and platform and good idea to leverage that huge gap between what Republican voters wanted, and the Republican platform, to judo-flip and pin the whole official party apparatus in the span of a couple years. Republicans, the voters, didn't change, or if they did, it was years and years before Trump.
The problem is that the rest of our government is either inept, asleep, or have no will to do anything. Plus the Supreme Court has been stuffed with cronies, so there's really no other legal recourse.