A group of U.S. senators introduced legislation Thursday that would require the Trump administration to share reports on steps they are taking to comply with court orders surrounding deportations to El Salvador.

Even as the Administration refuses to reveal the names of those it has deported under the Alien Enemies Act, a network of lawyers and advocates is fighting to keep their cases alive.

New details deepen questions about the deportations, showing that El Salvador’s president pressed for assurances that the migrants were really members of the Tren de Aragua gang.