Will the Supreme Court crown King Donald?

Does the president have immunity from criminal prosecution? Or, to put the question more finely, does Donald Trump?

It should be an easy question for the textualist. Nothing in the Constitution grants him immunity. The framers knew how to put an immunity clause in the Constitution. Many of the states did; the framers chose not to. Case closed.

It should be an easy question for an originalist. The original understanding in 1789 was that the president was not a king who could do no wrong.