Answer:
While it is not known if President Nixon knew about or was involved in ordering the break-in at the Watergate Hotel, it is known that he and White House Chief of Staff H. R. "Bob" Haldeman were recorded on June 23, 1972, discussing using the CIA to obstruct the FBI's investigation of the Watergate break-ins. He even asked the CIA to slow the FBI's investigation, claiming national-security risks.
