you will see me. i promise. bro." >> shocking e-mails in the legal profession and as counsel to president of the united states. >> reporter: cnn legal analyst and prosecutor paul callan is also a new york attorney, aware of kasowitz's aggressive take no prisoners reputation which is infamous in new york's legal circles. shortly after fired fbi directors james comey testified before the senate intelligence committee, kasowitz swung hard on behalf of the president. >> the president never in form or substance directed or subjected that mr. comey stop investigating anyone. >> reporter: back then, just like in this e-mail tirade, callan sees echos of team trump. >> lawyers often become like their clients when they represent clients over a lifetime. and, of course, donald trump brags about the fact that he's aggressive, he takes no prisoners, as melania onces said, i think, you know, if you hit him once, he'll hit you back