As chairman of the House Oversight and Reform Committee, he had a prominent role in the ongoing impeachment inquiry. His committee has also been investigating other actions by the president, as well as Trump’s family.

His office announced that he passed away at approximately 2:45 a.m. Thursday at Johns Hopkins Hospital due to complications concerning longstanding health challenges.

He had an unspecified medical procedure on Sept. 19, causing him to miss one of his committees hearings. His office said at the end of September that they anticipated Cummings back at work when Congress returned to session.