Senator Tom Cotton has called on the Department of Homeland Security to immediately review all visas granted by the current administration after a Gazan man, Mahmoud Amin Ya'Qub al-Muhtadi, was indicted for allegedly participating in the October seventh Hamas attack and later entering the United States on a fraudulent visa. Cotton's letter to the department warns that there could be thousands of individuals with potential terrorist ties living in the country due to insufficient vetting of immigrants from the Middle East. The indictment against al-Muhtadi revealed evidence of his involvement with Hamas, including social media posts and geolocation data, yet he was still granted legal permanent resident status. Cotton is urging for a comprehensive audit of visas from high-risk countries since 2021, enhanced social media monitoring, and real-time watchlists to prevent similar security lapses in the future.