The discussion about U.S. border security focuses on mass migration and foreigners who circumvent our legal immigration system, but those aren’t the only valid concerns. What are the espionage risks to U.S. national security posed by legal immigration?

First, it must be understood that the vetting scheme employed by Immigration and Customs Enforcement is broadly inadequate from a counterintelligence viewpoint. ICE looks more for criminals and immigration fraudsters than foreign spies.

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