(June 17, 2004) - (New York-AP) -- In an interview with "60 Minutes," former President Bill Clinton calls his marital infidelity a "terrible moral error." Clinton says he committed adultery with White House intern Monica Lewinski because he could - and admits that's the worst possible reason. The interview is to air Sunday. Questioned by CBS News anchor Dan Rather, Clinton said he, his wife, Hillary Rodham Clinton, and their daughter, Chelsea, dealt with their family crisis through counseling. Clinton said he never considered resigning as president, and described his battle against the impeachment process "a badge of honor" because he believes the process was abused.