Complex sentence: Ann Lewis is an American political advisor who was Senior Advisor for Hillary Clinton for President, has served as the Director of Communications for HillPAC and Friends of Hillary 2005-2007 and from 1997--2000 as Director of Communications and then Counselor to Bill Clinton.
Split into simpler sentences: Ann Lewis is an American political advisor who was Senior Advisor for Hillary Clinton's presidential campaign. She has served as the Director of Communications for HillPAC and Friends of Hillary 2005-2007 and from 1997--2000 as Director of Communications and then Counselor to Bill Clinton.