Known as the McCarran-Walter Act, the Immigration and Nationality Act of 1952 allows for the…
“Suspension of entry or imposition of restrictions by the President, whenever the President finds that the entry of aliens or of any class of aliens into the United States would be detrimental to the interests of the United States. The President may, by proclamation, and for such a period as he shall deem necessary, may suspend the entry of all aliens or any class of aliens as immigrants or non-immigrants or impose any restrictions on the entry of aliens he may deem to be appropriate.”
VLA COMMENT: