There is no Constitutional stipulation that this is the role of the Court. It is an authority the Court arrogated to itself in Marbury v Madison. But for that determination by the Court in the earliest of days, to grow beyond its mandate, we might still have a Constitution today which resembled that which the framers contemplated.
The judges must interpret the Constitution in order to keep their own oaths. As must every officer in every branch. THAT is what Marbury actually says.
Marbury was NOT a judicial supremacist opinion, it was a constitutional supremacist opinion.
The modern lies about this very thing are destroying this free republic more than almost anything else.