They're still trying to paint Bernie as a one issue candidate? Sad! He's pretty far removed from a one issue candidate.
Bernie Sanders isn't a Hillary Clinton or a George H.W. Bush, though. Part of his appeal was in that he very clearly was not the kind of politician who purposefully "reinvents" himself along poll-tested, focus-grouped lines every time he or she faces a new electorate. And how do you go from being a self-declared socialist who endorsed Jesse Jackson in 1988 and mused about the upside of a leftward primary challenge to Obama in 2012 to being a "centrist" populist, anyway?
Because it would be in many ways an accurate self-portrayal (his record was to the right of her on guns, immigration, xenophobia, or her dubious claim that being a woman represented substantive change in itself). He mused about challenging Obama due to Obama's lack of populism, not due to Obama's insufficient social liberalism.
Immigration and xenophobia? Nope. Hillary voted for the Wall, Bernie voted against it. Hillary supported deporting the child refugees from Central America, Bernie opposed it.