original_query: What is the concept of "dual sovereignty" in international law?
query: What is the concept of "dual sovereignty" as it relates to the United States' system of government?
answer: The concept of "dual sovereignty" in the US context refers to the division of powers between the federal government and the state governments, as enshrined in the 10th Amendment.  It does not, however, align with the Westphalian concept of sovereignty in international law, where each state is fully sovereign within its own borders.