Potentially interesting legal situation -- Skeltor is claiming he will put an end to "oral declarations" -- when someone presents themselves at the border, declares themselves to be a citizen and asks for re-admission. The fact is, irrespective of what documents or whatever someone may or may not be able to present, if you are a US citizen, they cannot deny you entry, and the burden of proof is on them. So all it would take to bring this approach down is one person who refused to produce a passport at the border. It would take months, if not years, but the courts would have no option but to eventually rule that the individual must be admitted.