Updated July 22 at 2:03 p.m. ET
The president's eldest son and his former campaign manager have agreed to negotiate with the Senate Judiciary Committee to voluntarily provide documents and to appear behind closed doors. But they are not expected to appear at a hearing of the committee set for Wednesday, the committee's communications director told NPR on Saturday, adding the two men could appear "perhaps at a future hearing."
Meanwhile, the House Intelligence Committee says it wants to interview the president's son-in-law, Jared Kushner.