NEW YORK, Aug. 3 (UPI) -- The liberal radio network Air America is moving to a weaker AM signal in New York due to down ratings and shaky finances, the New York Post reported. The talk radio network failed to renew its two-year lease with the owners of WLIB (1190 AM), forcing left-wingers such as Al Franken to broadcast from WWRL (1600 AM) -- which has a weaker signal -- beginning Sept. 1, the newspaper said. "Air America" executives had previously run into trouble at WLIB after the station's owners -- Pierre Sutton and his father, former Manhattan Borough President...