Hunter Biden made an unannounced appearance on Capitol Hill on Wednesday and briefly visited the House Oversight Committee, where lawmakers were conducting a hearing on the vote to hold him in contempt of Congress.

His appearance came as a surprise to Republicans. The president’s son took no questions as he entered the room, but upon leaving roughly 30 minutes after he arrived, he remarked to reporters about the controversial conversations he had with his business partners while his father, President Joe Biden, was also on the phone.