During Tuesday's edition of The Last Word With Lawrence O'Donnell, the eponymous host asked historian Jon Meacham to address a tweet he sent out earlier in the evening, featuring a quote from Georgia Governor Clifford Walker at a 1924 Ku Klux Klan Convention, who argued that America should "build a wall of steel, a wall as high as Heaven." Meacham concluded the tweet with the hashtag #PastIsPrologue, an obvious attempt to compare President Trump to a Ku Klux Klan sympathizer.