John Dickerson is a CBS senior national correspondent and Chief Political Analyst. He is also a Contributing Writer to The Atlantic and is co-host of the Slate Political Gabfest.

CBS This Morning: John Dickerson on his new book on why the presidency is “the hardest job in the world”

CBS News' John Dickerson joins "CBS This Morning" with his new book, "The Hardest Job in the World: The American Presidency." Dickerson shares why he thinks ...