However, Catholic lobbying was particularly effective in the legislative arena, where their arguments – that contraception was unnatural, harmful, and indecent – impeded several initiatives, including an attempt in 1924 by Mary Dennett to overturn federal anti-contraception laws.For a detailed discussion of religious objection to birth control, see: Tobin, Kathleen (2001), "The American Religious Debate Over Birth Control, 1907–1937", McFarland.</ref>Dozens of birth control clinics opened across the United States during the 1920s, but not without incident.Robinson, Caroline Hadley (1930), "Seventy Birth Control Clinics", Williams and Wilkins (70 clinics in U.S. and Britain by 1930, cited by Kennedy, p. 291).</ref> In 1929, New York police raided a clinic in New York and arrested two doctors and three nurses for distributing contraceptive information that was unrelated to the prevention of disease.