William O. Douglas,
Perez v. Brownell — Dissent
“ Does the Constitution permit Congress to cancel his citizenship? Could an American who violated his passport restrictions and visited Red China be deprived of his citizenship? Or suppose he trades with those under a ban. To many people any of those acts would seem much more heinous than the fairly innocent act of voting abroad. If casting a ballot abroad is sufficient to deprive an American of his citizenship, why could not like penalties be imposed on the citizen who expresses disagreement with his Nation's foreign policy in any of the ways enumerated? ”
