Rich Little did a decent 'Nixon' imitation.

But yes, it was David Frye who absolutely mastered the man. I remember watching it, even physically he had the facial expression, shoulder hunch, and double-armed VICTORY stance.

Ironically, he made his Nixon SO infamous that that is all I really remember him for.

Rich Little did just about everyone well, including a fabulous Johnny Carson who no other impressionist could evey do quite so expertly.