A good question from this afternoon's 2301: Can a USA Citizenship Be Revoked?
I had never thought about this much before, but for various reasons it can. This would help resolve the issues Holder raised a post below - no need to worry about due process rights for the non-citizen enemy combatant, but the person subject to having citizenship revoked would probably have due process rights to challenge it. So the question is, can citizenship rights be revoked without due process? I do not know, but my guess is no.