Department of Homeland Security (DHS) Secretary Markwayne Mullin on Friday confirmed that the agency was individually reviewing the cases of each non-citizen they had discovered on the voter rolls.

President Donald Trump announced Thursday evening that the administration had found 278,000 non-citizens on voter rolls in cooperative states and warned of the threat to election integrity. Mullin, in a press conference, said that the agency was reviewing each instance.

"We are now going to that record," he said. "We're setting up a department in DHS ... We are going through these files one by one."

The matter of non-citizens on the voter rolls has long been a concern for Republicans, many of whom have warned that mass immigration and lax registration rules would lead to foreigners voting illegally.

Trump, for his part, urged Congress to pass a major voter ID bill to contend with the issue.

Ben Whedon is the Chief Political Correspondent for Just the News. Follow him on X.