‘He wouldn’t have needed a license if it were an iguana,” Justice Neil Gorsuch says. That sounds like a punch line, but “he” in this story is Marty Hahne, a Missouri magician. “It,” the non-iguana, is Mr. Hahne’s live rabbit. As a magical prop, the bunny is a classic, and probably more easygoing than a big lizard would be about getting yanked out of a hat for shrieking children. Justice Gorsuch, seated at a coffee table in his Supreme Court chambers, is narrating an anecdote from his book that goes on sale Tuesday, “Over Ruled: The Human Toll of Too...