8 times in American history, a President has died in office and been replaced by his Vice President.  Most of the time, not only the Veep, but the Constitutional system seemed unprepared for the change. What should be the powers of the substitute President, and should be assume the title, or keep a word like “acting” in front of it?  And what would happen if the Vice President also passed away while in office? Jared Cohen has written a new book, Accidental Presidents: Eight Men Who Changed America on the subject.