. >> columnist and political commentator pat buchanan served as an advisor and speechwriter theixon and discussed battles that made and broken president and divided america forever. >> dean had testified you would have to keep the conversations with dean. i did not think they were going to be that damaging, and keep you reallyou need should tape, and take the rest out and burn it and shut down this special prosecutor's office now before this thing grows into a monster. i did not know at the time, but nixon had called in hague and fred lazard and entertained this idea that he should bring the tapes, and they said it would be obstruction of justice. first, i did not recommend burning subpoenaed tapes. second, they were his property. existed. privilege everybody knew it. if he simply got rid of them, it was a fait accompli. president nixon said in his theirs, if he had burned tapes, as i urged him to do, that he would have survived, and i think that is right. >> sunday night at 8:00 eastern .n c-span's q&a each week, american artifacts takes you to museums and historic places to learn abou