Question

What did the Nixon tapes reveal about what Nixon knew and when he knew it?

Answer 1

This tapes revealed that President Nixon knew of his administration's role in the Watergate break-in. He was also caught to have committed treason to the country because it was found out that he was the one who stopped the talks between Vietnam and the United States for his own political agenda. He wanted to be president again. 

Answer 2

The right answer for the question that is being asked and shown above is that: "all of the above." Nixon tapes reveal about what Nixon knew and when he knew it  knew of attempts made by his administration and campaign staff to cover up their connection to the break-in.