[MichaelZuo]

This isn't true. US born citizens, excluding those naturalized or with a dual citizenship elsewhere, simply cannot be stripped of citizenship for any reason. Because this would reduce them to statelessness.

Although the UN treaty signed on this isn't binding for the U.S., it would certainly break a taboo and give justification for other countries to reduce their citizens to statelessness while they're in the U.S., thus blocking the possibility of repatriating them back to their home country.