Using Warren to attack Trump is perfect! She is beating him at his own game.
Watching this AMAZING clip at Crooks and Liars:
http://crooksandliars.com/2016/06/donald-trump-responds-elizabeth-warren
It's clear that he is at war with a black belt in taking on ass holes! But watching the clip I get a sense that she is his worst nightmare because she is a strong woman with charisma and guts. She is taking away his manhood which is what got him the nomination from idiots who are impressed with that kind of Alpha Male BS. He did have Fiorina to deal with before but she is by no means as skilled as Warren.
She is also hitting him by saying he inherited his money and gets by because he rips people off which is absolutely pitch perfect! What can he say to that? His entire identity is based on his being "rich" and "self made" and she cuts through that like a Ginsu knife through a tomato! It's so beautiful to watch! All he can do is call her Pocahontas which is really pretty lame and starts to fall flat after her relentless, articulate barrage of on point attacks. it's beautiful to watch!