at the meeting with Trump Jr. and Natalia Veselnitskaya.July 14, 2017The Associated Pressreported reported. The suggestion came after concern arose about his meetings with Russian officials and various financial dealings. TheJournal Fusion GPS co-founder Glenn Simpson testified in front of the Senate Judiciary Committee in August about theexplosive dossier he expressed intentions to both defy and comply with the subpoena, risking arrest for contempt and raising questions about how Mueller would respond to an uncooperative witness.