Tom Williams via Getty Images Republican Rep. Steve King of Iowa gave a remarkably racist interview to an Austrian “alt-right” site in August.

Rep. Steve King (R-Iowa) visited Austria in August and gave an extensive interview to a far-right publication there in which he spelled out, in clearer and more shocking terms than he ever has before, his white nationalist worldview.

The eight-term congressman, up for re-election next month, talked to Caroline Sommerfeld of the Austrian far-right propaganda site Unzensuriert (which means “uncensored” in English). Sommerfeld is a prominent intellectual in Europe’s neo-fascist identitarian movement, which has deep connections to America’s so-called alt-right.

The interview, published in September, came to HuffPost’s attention this week. In his conversation with Sommerfeld, King discussed his belief in the superiority of European culture over others. He talked fearfully of falling fertility rates in the West and spoke at length about his belief that Europe and America are threatened by Muslim and Latino immigration.

“If we don’t defend Western civilization, then we will become subjugated by the people who are the enemies of faith, the enemies of justice,” King said.

The interview is remarkable, capturing a sitting U.S. congressman completely fluent in modern white nationalist talking points just weeks before an election he is favored to win.

“This interview reveals a whole new level of reality underneath this guy’s politics,” said Roger Griffin, an expert on fascism and modern history at Oxford Brookes University.

King never would have opened up that way with mainstream reporters, since they wouldn’t understand what he was talking about, Griffin said. He added, “But with her, who is obviously steeped in this stuff, he just opens up because he knows he’s going to be understood.”

The congressman’s office did not respond to a request for comment. The interview took place on Aug. 24 at the Vienna Marriott Hotel and was conducted in English, according to Unzensuriert.

King’s conversation with Sommerfeld largely revolves around the paranoid idea of the Great Replacement — the belief that mass migration, particularly from Muslim-majority countries, is an extinction-level event for white European culture and identity. Or as he put it in the interview, a “slow-motion cultural suicide.”

“The U.S. subtracts from its population a million of our babies in the form of abortion,” King said. “We add to our population approximately 1.8 million of ‘somebody else’s babies’ who are raised in another culture before they get to us.”

Sommerfeld responded, “That’s what we call the Great Replacement.”

Nick Ryan, the director of communications at the British-based anti-racism advocacy group Hope Not Hate, told HuffPost that “terms such as ‘Great Replacement’ are the preserve of conspiracy theorists and extremists.”

It’s a phrase, he said, widely used by anti-Muslim European networks to refer to the supposed Islamification of Europe by migrants and refugees.