Jack N. Anderson, 83, a Pulitzer Prize-winning investigative reporter who for years was America's most widely read newspaper columnist, died Dec. 17 at his Bethesda home. He had Parkinson's disease. A crusader in the mold of muckrakers from a century ago, unbounded by contemporary notions of objectivity, Mr. Anderson was highly successful during the 1950s and 1960s, when few reporters actively...