One of the favorite lines used by those trying to steal our inheritance and destroy out country is that “America is a nation of immigrants.” Based on that fact, we are required to keep the immigration floodgates wide open. Putting aside the fact that there is a huge difference between a settler and an immigrant, and ignoring the point that even if that were true, a nation of immigrants has every right to at some point say, “We’re full, no more,” there is an even deeper way that this bit of propaganda is wrong. The presupposition of the “nation of immigrants” line is that immigration in the past was good for America and you are the descendant of an immigrant; therefore modern immigration into America is good, and you have no right to object. That presupposition completely falls apart when one looks at both the numbers and the racial composition of pre-1965 versus post-1965 immigration. An America with large, empty spaces taking in European immigrants is in no way similar to a full America taking in Asians, Central Americans, and Africans in greater numbers than we did Europeans when we had room to expand. See an interactive version of the map here.
The bottleneck in the middle is one of the reasons that Calvin Coolidge is in the top five of America’s all-time best presidents.