The conversations came back to haunt Richard Nixon. In the summer of 1974, the president lost his bid to keep his tapes under wraps, including the Smoking Gun, in the US Supreme Court 8-0. According to the Gerald Ford Presidential Library: "On Monday, August 5 , he released tapes of three conversations between himself and Haldeman recorded six days after the break-in. The text showed the president obstructing justice by ordering the FBI to end its investigation of the break-in. At the Cabinet meeting the next day, Vice President Ford stated that, as 'a party in interest,' he would have no further public comments on the issue. Nixon's remaining support in the House and Senate crumbled."
A transcript and audio file of the Smoking Gun tape is here.