“Coverup” was the Left’s perjorative framing of the events. There is no evidence that President Nixon had any advance knowledge of the Watergate break in or even who was actually behind it.
He was constantly on the defensive - but President Trump isn’t one to sit back and hope for the best.
The coverup involved the missing minutes from a tape recording done in the Oval Office. Nixon was indeed guilty of obstruction of justice. This was after the break in had occurred and probably he was not aware of it untill after the fact. Poor judgement on his part.
It does however pale in comparison to what Democrats have done ever since.