WASHINGTON — Democrats on a House committee are pressuring the White House to release a wide array of documents about the security clearances granted to former National Security Adviser Michael Flynn and Jared Kushner, President Donald Trump’s son-in-law and top aide.

In a letter Wednesday, 18 members of the House Oversight and Government Reform Committee said they have “serious concerns” about how the White House is handling classified information and who is being allowed access to such sensitive material.

The letter, citing news reports, singles out Kushner for failing to disclose numerous contacts with foreign officials on his security clearance questionnaire. It also questions why the White House allowed Flynn to have access to classified information after learning that he had misled administration officials about the content of conversations with a Russian diplomat.

Kushner’s attorney, Jamie Gorelick, said she hadn’t seen the letter and was out of the country.

Flynn, who was later fired over the misleading statements, is currently the subject of congressional probes and the investigation led by special counsel Robert Mueller into Russia’s interference in the 2016 presidential election and possible collusion with Trump associates.

Kushner is currently in the Middle East attempting to broker a peace deal.