“The exclusion of aliens is a fundamental act of sovereignty … inherent in the executive power,” the Supreme Court said in 1950. And lest there be doubt, Congress adopted a provision in 1952 saying the president “may by proclamation and for such period as he shall deem necessary, suspend the entry of all aliens and any class of aliens as immigrants or non-immigrants” whenever he thinks it “would be detrimental to the interests of the United States.” |