that roger stone says he never discussed anything improper with donald trump and added, quote, unless mueller has tape recordings of the phone calls, what would that prove? joining us now the professor, harry litman, deputy assistant attorney general, and eugene robinson, and jennifer ruben, opinion writer for the washington post and msnbc contributor. and eugene, i want to start with you quickly since you remember every one of these beats that unfolded during the watergate investigation. the idea richard nixon would have ever allowed himself to be caught publicly discussing the pardons of bob halderman and others was just unthinkable to nixon who knew where the impeachment lines were drawn. because there were lines. there used to be lines, lawrence. and amid the evidence compiled by leon as evidence of richard