In an interview, Olivia Troye recalled sitting in meetings where Mr. Miller demanded restrictions on refugees, including those from Afghanistan and Iraq. She said the reductions in the refugee program during the Trump years hollowed out the government’s ability to bring the interpreters and others to the United States.

“Now we are in this crisis and they are saying Trump would have evacuated them,” Ms. Troye said. “But he didn’t in four years. You don’t get to play revisionist history here. There are people who know what the situation is.”…

Mr. Miller did successfully press for deep cuts to the number of refugees that the United States let into the country, though the Trump administration did seek to prioritize the more limited visas for those for Afghans and Iraqis near the end of the president’s term.

In 2017, when Mr. Trump imposed a travel ban on foreigners, including Iraqis, H. R. McMaster, the former national security adviser, was furious that it would block Iraqi allies who helped the military during the war there. After repeated clashes between Mr. McMaster and Mr. Miller, Mr. Trump reluctantly agreed to take Iraq off the travel ban.