“Trends in international trade have moved against U.S. workers,” [Harris] wrote. “U.S. immigration laws have been modified in ways that increase the influx of low-skilled workers, who compete with native-born youths and low-skilled adult workers for low-skilled jobs.
“This shift has been a particularly serious problem for blacks, who constitute a high proportion of the low-skilled adult workers,” according to the book.
More.
The New York Post's Jon Levine laughably tars this as merely a point of view "typical of far-left economic thinking on immigration".
But Marx viewed free-trade as an accelerant of social revolution precisely because it destroyed national identities.
The real revolutionaries who would destroy America are the enthusiasts for mass immigration, which dilutes and replaces the native born patriot population. Paul Krugman joined them in February, infamously flip-flopping to "immigrants make America stronger".
The free-trade libertarians of the Republican Party at The New York Post and The Wall Street Journal and the open borders Democrats are the same party.