The Justice Department on Monday will unveil “significant national security cases” regarding “malign influence schemes and alleged criminal activity by a nation-state actor” in the United States, according to a statement by the department. Attorney General Merrick Garland was scheduled to hold a press conference announcing more details at 1:30 p.m. “Nation-state actors” typically refer to highly skilled cyber hackers working on behalf of a foreign adversary and aim for high-profile targets such as the military, government infrastructure, or large-scale disinformation or propaganda campaigns. It was not immediately clear to which nation-state the Justice Department announcement was referring. However, the...