What Progressive base hasn't Hillary handed over to Sanders? She has maybe the PTA moms, the labor Unions and Teachers Unions, abortion defenders, they may be stiil in her camp- but the groups that were stringly pro-Obama, college age kids, twentysomthings, the veterens of the Occupy movement, and the radicalized left like anonymous, now solidly voting for Sanders. And their hatred oh Hillary has grown so much if she is the nominee, she may not be able to draw them back in.
