Democratic Double Standard During Watergate?

Consider this passage from Evan Thomas:

"Nixon correctly, but futilely, complained to his family and his aides about a double standard. Pat Nixon began collecting examples from earlier administrations, including a quotation from Franklin Roosevelt’s son John, who told a newspaper columnist, “Hell, my father just about invented bugging. He had them spread all over, and thought nothing about it.” William Sullivan, a former high-level FBI official close to Nixon, provided the Senate Watergate Committee with a memo detailing widespread political bugging and wiretapping by the FBI under earlier Democratic administrations. But the report was buried by the Democratic staff as unproven, too personal, or irrelevant."