FILE - In this July 20, 2017 file photo, President Donald Trump listens as Merck CEO Ken Frazier speaks in the Roosevelt Room of the White House in Washington. If there's one thing no business likes, it's the departure of top talent. That even applies to the nation's government, which has seen a revolving door of CEOs exit from federal panels created years ago to advise the U.S. president. (AP Photo/Alex Brandon, File)