By Katherine DoylePresident Donald Trump has directed the federal agency that oversees legal immigration to the U.S. conduct a sweeping review of Green Card holders from what the administration calls countries of concern, the head of U.S. Citizenship and Immigration Services said Thursday.“At the direction of @POTUS, I have directed a full scale, rigorous reexamination of every Green Card for every alien from every country of concern,” USCIS Director Joseph Edlow said Thursday afternoon in a statement on X.Edlow said that protecting the country “remains paramount” and that “the American people will not bear the cost of the prior administration’s reckless resettlement policies.”USCIS did not immediately respond to a request for details on which countries are considered “of concern.”The U.S. Citizenship and Immigration Services Miami Field Office.Wilfredo Lee / APThe move comes a day after a shooting near the White House left two members of the National Guard in critical condition. Federal prosecutors say the suspect, an Afghan national who once assisted American forces, was resettled in the U.S. under a program called Operation Allies Welcome during the Biden administration following the U.S. withdrawal from Afghanistan in 2021.Jeanine Pirro, the U.S. Attorney for the District of Columbia, said Thursday morning that her office is reviewing the suspect’s immigration history and the vetting process that allowed his entry into the country.A source familiar with the case and a separate law enforcement source told NBC News that the suspect was granted asylum this year.D.C. National Guard shooting suspect faces charges of assault with intent to kill02:25Two West Virginia National Guard members — identified as Sarah Beckstrom, 20, and Andrew Wolfe, 24, from West Virginia — remain in critical condition following the attack. They were in Washington as part of Trump’s deployment of federal troops to several U.S. cities.In a video released by the White House, Trump called the attack an “act of terror” and said additional National Guard troops would be deployed to Washington.The administration said all immigration requests relating to Afghan nationals will be halted indefinitely.This is a developing story. Please check back for updates.Katherine DoyleKatherine Doyle is a White House reporter for NBC News.