attorney general agrees to fire archibald cox. the so-called saturday night massacre. still, nixon is hardly immune to it all. about nine months later, nixon, on the verge of impeachment. but instead of being removed from office, he resigns. >> i shall resign the presidency effective at noon tomorrow. >> reporter: randi kaye, cnn, new york. >> david gergen and timothy naftali are back with us you. were working for nixon the night he ordered the firing of the special prosecutor. when you heard this proportionate that president trump had also ordered mueller to be fired, what were you thinking? is history repeating itself? >> it sure triggered a lot of memories when i read that the president did want to fire mueller, and fortunately someone talked him out of it. his own attorney said you do that and i'm out of here. and that persuaded him not to do it. so it was the saturday night massacre that didn't happen. i can tell you, going back to october of '73, at that time i