Trump brutally mocked for 'tweeting like a frightened 12-year-old' after Mueller wraps up damning testimony
President Donald Trump (MSNBC)

President Donald Trump tweeted out a response to Robert Mueller's congressional testimony minutes after the hearings ended.

Mueller testified before the House Judiciary and Intelligence Committees on Wednesday, when he agreed the president could be prosecuted after he leaves office and revealed Trump had given inaccurate statements in his written responses to investigators.

Other social media users were astonished.