>> take us behind what we're waiting for next in the michael cohen situation which is that the judge ruled she will not let cohen's lawyers or the president's lawyers what will be open to privilege or not. explain what a special master is. >> it is kind of, as rachael madow said last night, it is a mini judge. it is a neutral third party appointed by the judge in this case who gets to make rulings but not final rulings. only the judge can make those rulings, but makes decisions on things like the way the privilege process will work, is