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Fifty years ago, President Richard Nixon – facing impeachment and removal from office amid charges of abuse of power, obstructing justice, and contempt of Congress – was visited by leading members of his own party, which had abandoned him; he resigned. But if Watergate happened today, with today's polarized politics and hot-button media environment, would a President Nixon survive? CBS News' John Dickerson talks with Garrett Graff, author of "Watergate: A New History," and historian Brian Rosenwald about a political climate change.