Donald Harris, an emeritus professor at Stanford University, issued a warning against the mass immigration of low-skilled workers in a 1988 treatise he co-authored titled “Black Economic Progress: An Agenda for the 1990s.”

At that time, Harris, now 86, was clear and unambiguous in his stance, the New York Post reported.

“Trends in international trade have moved against U.S. workers,” he 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,” the book noted.

Harris, a Marxist economist, lives just two miles away from his daughter in Washington, D.C., but the two seldom communicate, The Post added.

The book, published two years after the 1986 immigrant amnesty law signed by President Ronald Reagan, reflects typical far-left economic views on immigration.

Vermont ‘Independent’ Sen. Bernie Sanders, one of the more socialist members of Congress, was once a sharp critic of mass migration and blasted open borders as a “Koch brothers proposal.” He told left-wing columnist Ezra Klein in 2015 as he was gearing up to run for the Democratic presidential nomination, “It would make everybody in America poorer.”

Vice President Harris has endorsed providing “pathways to citizenship” for illegal aliens, making it a cornerstone of her 2024 presidential campaign.

The U.S. Citizenship Act of 2021, introduced by the Biden-Harris administration on their first day in office, aimed to grant legal status to millions of illegal aliens currently residing in the United States, The Post noted.

“The influx of illegal immigrants and thus low-skilled labor advocated by Harris/Walz, exacerbates inequalities by driving down wages and creating competition among those already marginalized, particularly black Americans,” black GOP political consultant Shermichael Singleton told the outlet.

“The welfare of native-born citizens, particularly those who have historically faced injustices like black Americans — must come first. The problem with illegal immigration isn’t merely economic but existential,” Singleton added.

The Biden-Harris immigration policies have been disastrous for the United States and now a group of Republican states, led by Texas, is suing over one of those policies known as “parole in place.”

The Republican states said in the lawsuit that the program creates a pathway to citizenship for illegal immigrants, skirting by Congress, for “political purposes,” Just The News reported.

“This action incentivizes illegal immigration and will irreparably harm the Plaintiff states,” the plaintiffs said in the lawsuit.

The program was started on Monday and it allows the illegal immigrant spouses of citizens to stay in the United States and apply for a green card with a pathway to become citizens.

“In order to qualify for the program, the spouse must have been in the United States for at least 10 years, have no disqualifying criminal history, and have been married to the U.S. citizen by June 17,” the report said.

But the administration said it would defend the program and accused Republicans of “playing politics” with the border and not searching for a solution to the crisis.

A former Border Patrol union chief has also claimed that since President Joe Biden gave Harris the responsibility to address the underlying causes of illegal immigration in 2021, she has fallen short.

“It’s very disappointing,” Brandon Judd, who recently retired as president of the Border Patrol Union, told Fox News. “We gave her the policies that she needed to implement. She refused to implement those.”

Judd’s remarks coincide with heightened scrutiny of Harris’s immigration and border security record in the days following Biden’s announcement that he would not be running for president and would instead support his vice president to succeed him.

Critics claim Harris has failed to adequately address a key topic that could determine the outcome of the 2024 election.