Jimmy Carter also banned Iranians.
President Jimmy Carter took action. ... In addition to the Iranian student situation, Carter ordered officials to “invalidate all visas issued to Iranian citizens for future entry into the United States.”In 1980, Carter announced that the U.S. was breaking diplomatic relations with Iran and ordered all Iranian diplomats and officials to leave the country by midnight the next day, according to an April 8, 1980 article in The Crimson.
1. Exclusion of the Chinese
As millions of people became refugees during World War II, US President Franklin D Roosevelt argued that refugees posed a serious threat to the country's national security. Drawing on fears that Nazi spies could be hiding among them, the country limited the number of German Jews who could be admitted to 26,000 annually. And it is estimated that for most of the Hitler era, less than 25 percent of that quota was actually filled.