Vice President Kamala Harris’ father, Donald Harris, once co-authored a treatise in which he argued mass immigration was dangerous for the United States, particularly for black Americans.

The 1988 book titled “Black Economic Progress: An Agenda for the 1990s” described immigration as “a particularly serious problem for blacks” due to there being fewer jobs available for working-class Americans, according to the New York Post. Donald Harris was reportedly a Marxist economist and currently has a strained relationship with his daughter, the sitting vice president, following his divorce from her mother and a difficult custody battle.

“Trends in international trade have moved against U.S. workers,” the treatise reads, according to the Post. “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,” the book continues, according to the Post.

Kamala Harris assumed the unofficial role of “border czar” under the Biden-Harris administration during which there were roughly 8.5 million migrant encounters along the U.S.-Mexico border. The vice president proclaimed in August her new-found support for the building of a wall along the southern border after repeatedly criticizing former President Donald Trump for his stance on immigration and previously referring to his plan for a wall as “un-American.”

An October House Judiciary Committee report revealed that nearly one million illegal migrants currently reside in the U.S. without consequences or fear of deportation under “quiet amnesty” due to their immigration cases being closed, terminated or dismissed.

The Harris campaign did not immediately respond to the Daily Caller News Foundation’s request for comment.

Featured Image Credit: Gage Skidmore from Surprise, AZ, United States of America