MSNBC’s Mika Brzezinski called on Debbie Wasserman Schultz to step down as chair of the Democratic Party because the Florida congresswoman is blatantly favoring Hillary Clinton over Bernie Sanders. Appearing on “Morning Joe” on Wednesday, Brzezinski said that Sanders treatment by the Democratic Party “has been very poorly handled from the start. It has been unfair and they haven’t taken him seriously, and it starts quite frankly with the person that we just heard speaking. It just does.” Brzezinski’s call for a change of leadership was in response to Wasserman Schultz’s criticism of Sanders from Tuesday night when she said,...