Trump administration stops ambassador testifying on impeachment

The Trump administration has blocked the US ambassador to the European Union from testifying to a congressional impeachment investigation. Gordon Sondland was due to meet behind closed doors on Tuesday with staff from three Democratic-led House committees. But the envoy was directed by the Department of State not to attend. Our correspondent in Washington, Jaguti Dave, says it appears to be a calculated strategy from the president and his team to block proceedings.