"The flood of newcomers, vividly different from earlier migrants in faiths, tongues, and habits, aroused powerful anxieties about the capacity of American society to accommodate them. Some of that anxiety found virulent expression in a revived Ku Klux Klan, reborn in all its Reconstruction-era paraphernalia at Stone Mountain, Georgia, in 1915. Klan nightriders now rode cars, not horses, and they directed their venom as much at immigrant Jews and Catholics as at blacks. But the new Klan no less than the old represented a peculiarly American response to cultural upheaval. By the early 1920s the Klan claimed some five million members, and for a time it dominated the politics of Indiana and Oregon. The nativist sentiment that the Klan helped to nurture found statutory expression in 1924, when Congress choked the immigrant stream to a trickle, closing the era of virtually unlimited entry to the United States. The ethnic neighborhoods that had mushroomed in the preceding generation would grow no more through further inflows from abroad. America’s many ethnic communities now began to stabilize. Millions of immigrants awaited the day when they might become American at last."