Ever since the Supreme Court recognized birthright citizenship in 1898, generations of Americans have accepted that the United States Constitution encodes an absolute rule that if someone is born on U.S. soil, they are a citizen, end of story. But fringe elements of American society have repeatedly tried to attack this fundamental rule. During World War II, one group—the Native Sons of the Golden West—pursued such an attack all the way to the Supreme Court. Later this week, the Court will once