There is only one person who controls Hillary Clinton’s fate, and it isn’t Hillary Clinton. Mrs. Clinton is careening toward possible criminal charges involving her alleged mishandling of classified material on her personal email server while she was secretary of State. And President Obama is driving the bus. She and her team have, of course, reverted to form, blaming everyone but themselves: a “right-wing conspiracy,” The New York Times, overzealous investigators. What they are missing, however, is the one figure who wants her taken out politically, and who has the power to do it. She and Mr. Obama have a...