Updated at 4:20 p.m. ET
John Dowd, the veteran attorney leading President Trump's outside legal team, has tendered his resignation, marking a shakeup just as Trump had turned his Twitter ire on special counsel Robert Mueller and his investigation.
Dowd declined to explain why he was leaving the team that is helping the president deal with the Russia investigation. But a source familiar with Dowd's thinking says he was tired and frustrated, in a draining job with not enough resources and with a client who was not taking his advice.