On May 6, 1882, President Chester Arthur signed the Chinese Exclusion Act, the first federal law to restrict immigration based on race and nationality. It prohibited Chinese laborers from entering the United States and barred Chinese immigrants already present from becoming citizens. Renewed and expanded in 1892 and made permanent in 1902, the act established the legal framework for race-based immigration exclusion that would shape U.S. policy for decades and inspire subsequent restrictions targeting other groups.