text:  You're tuned to The Conversation here on Hawaii Public Radio. I'm Catherine Cruz. It has been a week since the U.S. Supreme Court issued a ruling on presidential immunity. It's a case that thrusts the justices into an area that some thought they would never have to tread. Avi Sofer is a constitutional law historian. He served as law school dean at the University of Hawaii for 17 years. And prior to that, he was dean at the Boston College Law School.