What evidence existed that could prove that President Nixon knew about Watergate break?

Evidence suggesting President Nixon's knowledge of the Watergate break-in includes the existence of tape recordings from the Oval Office that captured conversations about the cover-up. Additionally, the testimony of former aides, such as John Dean, indicated that Nixon was involved in discussions regarding the efforts to obstruct the investigation. The timing of Nixon's attempts to secure funds for hush money also pointed to his awareness of the events surrounding Watergate. Collectively, these pieces of evidence contributed to the perception that Nixon was complicit in the scandal.