David Broder Died : U.S. Political Reporter, Journalist Died at 81

David S. Broder, who skillfully straddled the line between commentary and reportage as a longtime political correspondent and columnist for The Washington Post and as a frequent commentator on television, died on Wednesday in Arlington, Va. He was 81. The cause was complications of diabetes, The Post reported.Mr. Broder,was often called the dean of the Washington press corps. He was a fixture at