One of the worst laws ever signed by a president. Prior to this, >100,000 European Jews came to the US annually. Many millions would have come but for this monstrosity, to say nothing of the millions of others who would’ve escaped before being consumed by war & dictatorship.
Calvin Coolidge signed into law the Immigration Restriction Act just over 100 years ago, stating flatly ‘America must remain American.’
Among other things, it introduced visa requirements, the border patrol, and the legal category of the ‘illegal alien.’
The law dramatically reduced the number of people coming into the country, and provided a breathing space for a diverse population to coalesce. By the 1950s, an American society existed, with all the Poles, Germans, Jews, Italians and so on more or less integrated into the Anglo-American culture.
It can be done again.