Trump launched attack on impeachment witness on Twitter
US President Donald Trump attacked a former US ambassador on Friday on Twitter while she was testifying to an impeachment hearing in Congress. Marie Yovanovitch, a career diplomat, said she was pulled back to Washington to clear the way for Trump allies to persuade Ukraine to launch corruption probes into Joe Biden. "Everywhere Marie Yovanovitch went turned bad. She started off in Somalia, how did that go?" Trump wrote on Twitter.