Subject: Re: Wonderful Meditation by Jonathan Last
“the issue is whether a person should be admitted to the country. And the Court's precedent is that Congress has absolute and plenary authority to answer that question however they want. They can just say "no"

This only applies to asylum seekers who have registered. Visa over stayers or border crossers would have to be detained and have their lack of legal residency status proven before deportation. In other words, habeas corpus would apply. If not, the American citizens are likely being deported.