Author of new book on Democratic fractures: Joe Biden 'sensitive' to Elizabeth Warren’s criticism

In, 2015, then-Vice President Joe Biden, was "sensitive to the critiques" Elizabeth Warren had been leveling at Biden for years, according to Jon Ward, senior political correspondent for Yahoo News, who recently published a new book, "Camelot's End: Kennedy Vs. Carter And The Fight That Broke The Democratic Party."

Biden, "talked about Elizabeth Warren frequently, unprompted," Ward told Powerhouse Politics podcast hosts, ABC News' Political Director Rick Klein and Chief White House and Washington Correspondent Jonathan Karl, when he recounted interviewing Biden about issues that split the Democratic party.