U.S. President Donald Trump on Thursday said he intends to impose a permanent suspension on immigration from what he described as “Third World Countries,” arguing that such a move is necessary to give the American system time “to fully recover.” His remarks came a day after an Afghan national allegedly shot two National Guard soldiers in Washington, D.C.

“I will permanently pause migration from all Third World Countries to allow the U.S. system to fully recover,” Trump wrote on Truth Social, adding that he plans to “terminate all of the millions of Biden illegal admissions.”

In a lengthy post, Trump claimed that immigration had weakened both economic and social conditions in the United States.

“Even as we have made technological progress, immigration policy has eroded those gains and degraded living conditions for many,” he wrote. Trump said he intends to permanently halt migration from these countries, revoke what he called “Biden illegal admissions,” remove individuals who he believes do not benefit the U.S., cut federal benefits for non-citizens, denaturalize migrants who “undermine domestic tranquility,” and deport any foreign national deemed a public burden, security threat, or “non-compatible with Western Civilization.”

He added that these goals would be aimed at dramatically reducing “illegal and disruptive populations,” including those who he claims were admitted through an “unauthorized Autopen approval process.” According to Trump, “only reverse migration can fully cure this situation.”

Trump also posted a photo referencing the Afghanistan evacuation, calling it “horrendous,” and wrote: “This is part of the horrendous airlift from Afghanistan. Hundreds of thousands of people poured into our country totally unvetted and unchecked. We will fix it, but we will never forget what Crooked Joe Biden and his thugs did to our country!”