Poor Chris Matthews, he really is working for the same thing as most of the people here, yet all he gets is derision. He really wants anyone but Hilary to win the nomination and is willing to do everything he can to make it happen. His motives might differ from those positively pushing a candidate. He knows the Clintons carry grudges and his impeachment performance will get him the same WH access with the Clintons as he now has with the Bush's.
He facilitated the Elizabeth call in a way that allowed her to rehearse and edit her words. He informed Ann of the call just before they went on the air. This allowed him to claim he was fair, but not give her much time to get down her shyster lawyer spiel.
He then gave John time on the next day's show and pitched the hardballs underhand. And still you all hate him. Sometimes cats do all move together.