 However, she had been denied voter registration by the respondent in his capacity as a Commissioner of the San Francisco Board of Election on the grounds of her marriage to a Scottish man.MacKenzie contended that the Expatriation Act of 1907 "if intended to apply to her, is beyond the authority of Congress", as neither the Fourteenth Amendment nor any other part of the Constitution gave Congress the power to "denationalize a citizen without his concurrence".However, Justice Joseph McKenna, writing the majority opinion, stated that while "[i]t may be conceded that a change of citizenship cannot be arbitrarily imposed, that is, imposed without the concurrence of the citizen", but "[t]he law in controversy does not have that feature.