Over the weekend, some voters in Iowa received robocalls featuring the voice of prominent white nationalist Jared Taylor urging them to vote for Donald Trump because “[we] don’t need Muslims. We need smart, well-educated white people who will assimilate to our culture.”

The ads were paid for by a group called the American National Super PAC, which is registered at the FEC by William Johnson, a Los Angeles-based attorney who specializes in working with Japanese and Chinese corporations and is also the chairman of the racist American Freedom Party. Johnson speaks briefly on the robocalls, identifying himself as “a farmer and white nationalist.”

It’s hardly a surprise that Johnson would support Trump, who has called for barring Muslims from entering the U.S., thinks the U.S. should ignore the 14th Amendment’s birthright citizenship clause and wants to round up and deport all undocumented immigrants living in the country, since the real estate magnate might be the closest he’ll get to a candidate who will carry out his goal of deporting most non-white people from the U.S.

In the 1980s, Johnson put considerable effort into promoting his plan to strip the citizenship of and deport all but a small number of non-white people from the United States. From the Southern Poverty Law Center:

In 1985, under the pseudonym James O. Pace, Johnson wrote the book Amendment to the Constitution: Averting the Decline and Fall of America. In it, he advocates the repeal of the 14th and 15th amendments and the deportation of almost all nonwhite citizens to other countries. Johnson further claimed that racial mixing and diversity caused social and cultural degeneration in the United States. He wrote: “We lose our effectiveness as leaders when no one relies on us or can trust us because of our nonwhite and fractionalized nature. … [R]acial diversity has given us strife and conflict and is enormously counterproductive.” Johnson’s solution to this problem was to deport all nonwhites as soon as possible. Anybody with any “ascertainable trace of Negro blood” or more than one-eighth “Mongolian, Asian, Asia Minor, Middle Eastern, Semitic, Near Eastern, American Indian, Malay or other non-European or non-white blood” would be deported under the Pace Amendment. To smooth the process, Johnson proposed that financial incentives be offered to nonwhites who cooperate with the government in the deportation process. Nonwhites who are too old to leave would be allowed to stay, as they were past childbearing age and did not present an obstacle to long-term racial homogeneity. Johnson imagined that black Americans could be employed to help the transition. He wrote, “Because of their physical abilities, the blacks would be the ideal enforcers.” Johnson believed it critical that the amendment be enacted; if not, he said, nonwhites would strip rights from white Americans, potentially leading to a deadly “race war.” For Johnson, the deportation of nonwhites is an act of self-defense, a preemptive strike in defense of real Americans.

Johnson specified that “Hispanic whites, defined as anyone with an Hispanic ancestor, may be citizens if, in addition to meeting the aforesaid ascertainable trace and percentage tests, they are in appearance indistinguishable from Americans whose ancestral home is the British Isles or Northwestern Europe.”

Back in October, Trump issued a blanket disavowal of all super PACs supporting him. Maybe it’s time for him to remind his many white nationalist supporters of that.