Top Democrats on the House Oversight Committee want to know if National Security Adviser John Bolton told the White House about his reported contact with alleged Russian spy Maria Butina before he was appointed by President Trump.

Bolton appeared with Butina in a video roundtable discussion about gun rights, reportedly sponsored by the Russian organization Right to Bear Arms, in his previous position as a top National Rifle Association official, Democrats Elijah Cummings and Stephen Lynch wrote in a letter to White House Chief of Staff John Kelly delivered Monday.

Butina was charged in July by federal prosecutors with infiltrating the National Rifle Association and spying on the United States.

“Given the alarming and unprecedented nature of these revelations — and the high-level position of trust Mr. Bolton now holds — we request that you produce documents relating to whether Mr. Bolton reported his previous work with this alleged Russian spy on his security clearance forms or other White House vetting materials prior to President Trump appointing him to his current position,” they wrote.

Cummings is the ranking Democrat on the Oversight and Government Reform Committee. Lynch is the ranking Democrat on the subcommittee on national security.