report is to president trump what the so-called watergate road map was to president richard nixon. stated a little differently, special counsel mueller has provided this committee with a road map. >> reporter: ranking member republican doug collins calling today's hearing a, quote, mock impeachment inquiry. >> we don't appreciate the fact that here we are again with priorities in this committee turned upside down. >> reporter: but as the drum beat among democrats for an impeachment inquiry intensifies, dean's testimony is drawing the ire of the white house, calling him not credible. >> i've never been disbarred. i passed four state bars, never been disbarred, never went to jail for obstruction of justice and don't plan on it. >> reporter: and the president himself tweeting that dean is a, quote, sleazebag attorney and that democrats just want a do-over, which they'll never get. trump also on the defensive over his tariff threat with mexico, which critics have called a