How exactly would that work? People are voting for moderate candidates presumably because they DON'T want reforms to health care and immigration and all the rest. Besides, the general trend for Democrats is that they move to the right once they're in office. Both Clinton and Obama ran on fairly liberal platforms yet were largely content to continue, and in some cases even expand, the policies of their Republican predecessors. Joe Biden of all people is going to turn into some champion of social justice once in office? Can't even say that with a straight face.