Maryland Sen. Chris Van Hollen sent a letter to President Trump on Tuesday detailing the conversation he had about Kilmar Abrego Garcia with the vice president of El Salvador.

Maryland Sen. Chris Van Hollen introduced legislation Thursday that would require the Trump administration to produce a report over what happened to the man deported to El Salvador.

The Maryland Democrat accused the president of “gross violations of the Constitution and due process rights” and demanded the return of an immigrant and Maryland resident imprisoned in El Salvador.