It is clear that Right Wing Republicans (really most of the 2018 GOP) and President Donald Trump are working to repeal the 1965 Immigration Law passed under Lyndon B. Johnson, which allowed large migration from Latin America and Asia, instead of the earlier laws of the 1920s that favored European nations, ended Asian migration, and made it harder for the so called “New Immigration” groups from southern and eastern Europe (heavily Catholic and Jewish) to migrate at the time of Italian Fascism and German Nazism in the 1930s and early 1940s.
If it is left up to the Republican Party and Donald Trump, relatives of immigrants, beyond wife, husband, and minor children, will no longer be admitted to the country, and the number of immigrants admitted will be cut dramatically. Also, there would be an emphasis on European, rather than Latin American, Asian, and African immigration, a failed attempt to change the declining white percentage of the population, which will be less than 50 percent of the population in 2045.
This will have psychological and sociological effects on the immigrants, on the nation, and on the world image of the United States as the last and best hope for people escaping religious persecution, racial discrimination, and war and crime situations.
It will mean the death of many people who will have no recourse, much like the opponents of Fascism in Europe, and the mass sufferings of 13 million people in the Holocaust perpetrated by Nazi Germany from 1933-1945, including nearly six million Jews, but also seven million others of all nationalities and faiths.
America will suffer, as much of the immigrant labor may be deported, undermining the American economy in ways not totally understood now, but definitely having a deleterious effect on the future of the United States.