Plenary Power

"The plenary power doctrine protects the federal government from claims that it is violating an individual’s constitutional right to equal protection when it imposes discriminatory burdens on non-US citizens. This doctrine is justified on the rationale that the constitution provides congress and the executive with primacy over foreign policy and national security. Because immigration is assumed to be tied to foreign policy and national security, courts will subject federal immigration statutes and regulations to only deferential review."

CUNY Law School, The Plenary Power Shield: National Security and the Special Registration Program, Nitin Goyal, https://www.law.cuny.edu/legal-writing/forum/immigration-law-essays/goyal/.