FILE - In this Feb. 16, 1969, file photo, President Richard M. Nixon, is shown at his desk in the White House. For the first time since an Oval Office taping system was removed by Nixon’s chief of staff nearly 44 years ago, a president has hinted that White House conversations might again be secretly recorded. If so, President Donald Trump is following a problematic precedent. While several presidents secretly recorded conversations without problems, the practice is most associated with Nixon. His recordings became prime evidence during the Watergate investigation that ultimately led to his resignation. Sooner or later, recordings are likely to become public.(AP Photo/File)