One thing we learn early in United States schools, which Donald Trump does not seem to grasp, is the concept of "checks and balances."
Mr. Trump appears to prefer the dictator/tyrant mode. Of course, the United States was founded in exact and complete opposition to such a style. The land of the free and home of the brave cannot exist if there's a boss man on top. Trump's very being in his current role is an affront to the Constitution he swore to uphold.
But since he is in this office, for some reason, here's a fourth grade primer for Mr. Trump: the legislature makes laws; the executive enforces laws; the judiciary interprets laws. The judiciary is independent, for a reason. Politics should not enter the courthouse. A rejection of an Unconstitutional executive order is exactly what should happen. Hopefully this will occur in the case of the proposed Muslim ban.
In other words: the President is not a king.