https://www.reuters.com/article/us-usa-trump-russia-warner/twitter-briefing-to-u-s-congressional-investigators-disappointing-senator-warner-idUSKCN1C3358

U.S. Senator Mark Warner, top Democrat on the Intelligence Committee, said on Thursday he was deeply disappointed by the lack of information Twitter provided at a briefing for congressional investigators probing Russian interference in the U.S. election.