Research ReportCRS ReportVersion 2
R46142
The Power of Congress and the Executive to Exclude Aliens: Constitutional Principles
Published Dec 30, 2019Updated Jun 20, 2025
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What this is
The Congressional Research Service is a nonpartisan policy and legal analysis arm of the Library of Congress. CRS reports are written for members of Congress and their staff, not the public — but they’re made available openly through Congress.gov.