It also announced penalties against three candidates who bet on their own races.
George Santos is expected to plead guilty during a hearing Monday in federal court on Long Island, sources familiar with the case told ABC News.
The disgraced New Yorker, with no conviction, still has floor privileges.
With his victory in the special election, Suozzi will serve out the remainder of Santos' term, which ends in January.
"George Santos: The Man, The Myths, The Lessons," an ABC7 New York Eyewitness News investigation, explores the rise of the politician whose path to Congress was paved with lies.
Fetterman hired Santos to give "Bobby from Jersey" some advice.