incredible investigation in this, given the severity of the issues, importance of the issues. i think it will be best if he were to step aside and let someone else handle this investigation. >> our mark on turn of events tonight, ranking member, congressman adam shift is now saying his republican chair can no longer fulfill his duties. he has to be clear about how we arrived at this point. it started three weeks ago when the president of the united states went on twitter tirade, just found out that obama had my wiretap in trump tower, how low has he gone, bad, or sick guy. and thus began a wild goose chase, in which the vast machinery of the government intelligence services were called upon to look into this entirely unsupported claim which was then repeatedly shutdown. most memorable by fbi director who said under oath that there was no information to back up that claim, but two days after that testimony, nunes who was an adviser to trump transition team