1924年美国通过的移民法案，禁止亚裔移民。降低每个东欧和南欧国家移民美国的配额，配额是2%的1890年人口普查各个国家移民在美国的总额。意大利移民因此被限制在2000一年。

The Immigration Act of 1924, or Johnson–Reed Act, including the Asian Exclusion Act and National Origins Act ( Pub. L. 68–139, 43 Stat. 153, enacted May 26, 1924), was a United States federal law that prevented immigration from Asia and set quotas on the number of immigrants from Eastern and Southern Europe.

因为中美关系，美国现在有很大的动力再搞一次排华法案，限制大陆华人移民美国。