over a solid economic report today. mr. trump lashed out on twitter at the credibility of his former attorney. a knowledgeable source tells nbc news that michael cohen is prepared to tell special counsel, robert mueller, that the president knew in advance of that now infamous tower meeting of 2016. i want to bring in hans nichols at the white house and ken delaney following the in and ouo ins and outs. >> hahns, let me start with you there. what has been the response from the president and his son? >> well, craig, as you mentioned there is a denial from the president but really there is a tone of the denial and counter punching that we have from president trump taking aim at his old aid and former top