Not so. President has to be impeached before *any* criminal proceedings.
You’ll find that in the Umbra of the Penumbra
Hitler had immunity, too.
Immunity for the President is delegated by the people to support the U.S. Constitution. An ineligible president waives immunity to assume the Office of the President of the United States to “fundamentally change” America.
No immunity means criminal prosecution of a sitting President, who happens to be in violation of the U.S. Constitution while in office, is available.