The 1898 supreme court case called United States vs. Wong Kim Ark had affected enforcement of the Chinese Exclusion Act, because the court found that people born in the U.S. to Chinese parents were U.S. citizens.
Research:

SYMHC Classics: Nelson Pill Hearings
38:25

Behind the Scenes Minis: Alaska and Contraceptives
28:17

The IUD: A History
44:41