Things got testy between Joe Scarborough and Howard Dean on today's Morning Joe over the issue of the Dem party moving left.  In a particularly unkind cut, Scarborough accused Dean of spouting "Carl Bernstein nonsense," while Dean tried to shut Scarborough down, bleating "blah, blah, blah, blah, blah."  Adding spice to the mix, Mika Brzezinski made clear her great regard for lefty Senator Elizabeth Warren, saying she'd make a "formidable" presidential candidate. 

The fracas was detonated by a discussion of a Wall Street Journal op-ed by a centrist Dem group called "The Third Way," which argued that following proposals from Warren and far-left, newly-elected NYC Mayor Bill de Blasio, would be electorally "disastrous" for Dems.  That in turn engendered a New York Times article about infighting among Dems, reporting among other things that Warren is using "hardball" tactics to intimidate banks supporting The Third Way. View the video after the jump.