Roundtable: This Week in Politics Jack Lew Won't Call Mandate a Tax White House chief of staff calls health care mandate a penalty, not a tax. Keith Olbermann, George Will, Donna Brazile, Rep. Artur Davis, Terry Moran. What Year Was It? A look back in time, and George Stephanopoulos answers viewer questions. Paul Ryan on John Roberts The GOP congressman blasts the chief justice's ruling on health care. Jack Lew on Health Care Mandate The president's chief of staff on the impact of the Supreme Court's ruling. Vicki Kennedy on Health Care The widow of late Sen. Ted Kennedy reflects on health care reform. Shaking Hands With The Enemy Queen Elizabeth II and Former IRA Commander exchange handshakes.