From an official Senate biography series on Vice Presidents:

On Tuesday, August 6, 1974, Nixon called a cabinet meeting to dispel rumors of his impending resignation. He announced that had decided not to resign because it would weaken the presidency and because he did not believe he had committed an impeachable offense. As Nixon then tried to steer the discussion onto economic issues, White House chief of staff Alexander Haig heard a stir from the group sitting away from the cabinet table:

It was George Bush, who as a guest of the President occupied one of the straight chairs along the wall. He seemed to be asking for the floor. When Nixon failed to recognize him, he spoke anyway. Watergate was the vital question, he said. It was sapping public confidence. Until it was settled, the economy and the country as whole would suffer. Nixon should resign.

Surely it was unprecedented, Haig observed, for the chairman of the Republican National Committee to advise a Republican president to resign from office at a cabinet meeting. The cabinet sat in shocked silence as all realized that Nixon's resignation was inevitable. Bush, who thought that Nixon had looked "beleaguered, worn down by stress, detached from reality," felt that the issue needed to be addressed squarely. In a letter the next day he reiterated that Nixon should resign, adding that his view was "held by most Republican leaders across the country."

Vice Presidents of the United States: George H.W. Bush (1981-1989)

Scott, be careful about succuming to the Conservative tendency to cannibalism. You're trying so hard to defend W that you're willing to make up stuff to trash his father. That's just silly, and doesn't strengthen your arguments.