Mr. Garth graduated from Washington and Jefferson College in Pennsylvania with a degree in mass psychology and served as an Army intelligence officer. He broke into television production by broadcasting high school football games on WPIX-TV in New York after convincing the station that he had the rights to the games and telling the schools that he had a commitment from the station. His two marriages ended in divorce, and he had no children. Besides Mr. Rosenbloom, his survivors include another nephew, Richard Rosenbloom, and a niece, Lauren Halky. By the late 1970s, Mr. Garth had made his reputation. He cut his political teeth on Adlai E. Stevenson’s short-lived 1960 presidential race; he went on to represent Governors Carey of New York, Ella T. Grasso of Connecticut, Brendan T. Byrne of New Jersey and John J. Gilligan of Ohio; as well as Mayors Koch of New York and Tom Bradley of Los Angeles. But his clients included several Republicans: Senators Arlen Specter and John Heinz of Pennsylvania; and Mayors Lindsay, Rudolph W. Giuliani and Michael R. Bloomberg of New York.