Six-day racing was popular in the United States until the Second World War. Then the rise of the automobile and the Great Depression brought a decline. Dickow said: "Attempts were made to revive the sport by several different promoters but none of them managed to restore bike racing to its former popularity." A further problem was that the more promoters brought in European opposition to spice up races for a potential crowd, the more the Europeans dominated and lessened the appeal for spectators. Jerry Rodman, one of the American riders, said: "In previous years, six-day bicycle racing faded only as a result of war or depression. Under the promotion of Harry Mendel, however, the sport, for the first time began to decline due to lack of spectator interest."