The only lesson these people learned from Watergate was to be more thorough in the cover-up.
Bill Clinton proved in his impeachment that if you dig in, attack, fight, throw scurrilous charges at your accusers, you CAN SURVIVE.
Hence from now on they shall ALL be doing it.
Young Hillary learned well how to obtain and lock in "plausible deniability". She added her own skills by being forgetful, developing exquisite obfuscation, running out the clock, in addition to the deny, attack the attacker, and the BIG ONE - the politics of personal destruction. Now THERE'S a legacy!