Lockhart served as the White House press secretary under President Clinton from 1998 to 2000. He also worked on Sen. John KerryJohn KerryKerry and his dog stroll through women's march Trump fails to mention Clinton in inaugural address Hillary Clinton under microscope at inauguration MORE's (D-Mass.) 2004 presidential bid, Clinton's 1996 run and other Democratic campaigns. He co-founded Glover Park Group, a Washington-based communications firm.
Lockhart joined Facebook in July of last year.