Part I of this series showed that under the Constitution, an “invasion” triggers powers and obligations for both federal and state governments. It also showed that mass unauthorized immigration at the Southern border meets the constitutional definition of an “invasion.”
Rob Natelson
Author
Robert G. Natelson, a former constitutional law professor who is senior fellow in constitutional jurisprudence at the Independence Institute in Denver, authored “The Original Constitution” (4th ed., 2025). He is a contributor to the Heritage Foundation’s “Heritage Guide to the Constitution.”
