sentences:  Lieberman was press secretary to Senator Joe Biden (D-DE) from 1988–1993; Director of Public Affairs for the Children's Defense Fund; and Communications Director for the National Urban Coalition.She was also a director of the Trust for Early Education, an advocacy group devoted to ensuring that children in America receive pre-Kindergarten preparation for education.Lieberman first joined the White House in 1993 as Assistant to First Lady Hillary Rodham Clinton's Chief of Staff.