 When allegations of President Clinton's extramarital affair with Monica Lewinsky first surfaced in January 1998, Penn conducted polls to help the administration craft its response.Penn subsequently led the research effort monitoring Clinton's level of public support throughout the impeachment and until Clinton was acquitted on February 13, 1999.In 2000, then-First Lady Hillary Clinton asked Penn to advise her on her run for the U.S. Senate from New York.