As I reflected further, I convinced myself that Nixon had not had prior knowledge to the break-in, nor of the cover-up that followed. Even if culpability reached dangerously close to the president, I reasoned, surely his top aides would have shielded him from damaging information, not just to protect themselves, but also to allow him to tell the nation, in the best faith, that neither he nor his chief advisors were involved.

At That Point in Time - Perception of Nixon's involvement and the nation