States as international persons — Composite States — Unions of States — Exclusive competence of Federal Government in foreign relations — Whether infringed by state law discriminating against non — resident aliens — The law of the United States

The individual in international law — Aliens — Plea of non — discrimination — Probate law imposing stricter requirements on non-resident aliens — Whether unconstitutional discrimination — The law of the United States

States as international persons — Sovereignty and independence — Conduct of foreign relations — Inheritance by non-resident aliens — Probate law imposing stricter requirements on non-resident aliens — Exclusive competence of the Federal Government in foreign relations — The law of the United States