The entrance of the Department of Homeland Security's headquarters at the St. Elizabeths campus in Washington, on March 15, 2024. The Cybersecurity and Infrastructure Security Agency has navigated staffing cuts without a Senate-confirmed leader. Employees have become demoralized and concerned about the agency’s ability to ward off threats. (Valerie Plesch/The New York Times) By ADAM SELLA In his first term, President Donald Trump established the Cybersecurity and Infrastructure Security...