By Matt Sepic, KWMU
St. Louis, MO – 
David Gergen knows Presidents. He's advised four of them: Nixon, Ford, Reagan and Clinton. He's also written about countless others, and now teaches at Harvard's Kennedy School of Government.
Gergen is also editor-at-large for U.S. News and World Report, and he'll speak at Powell Symphony Hall tonight as part of the St. Louis Speakers' Series.
Despite differences in style and substance, David Gergen tells KWMU's Matt Sepic there are a few qualities all Presidents share. (Gergen will speak Thursday, Mar. 25th at 8:00 p.m. at Powell Symphony Hall)