The White House says it won't co-operate with the Democrats impeachment investigation of President Trump, describing it as an attempt to overturn the result of the 2016 Presidential election.
The move came shortly after President Trump moved to block the US Ambassador to the EU from testifying on Capitol Hill about the President's communications with Ukraine.
Our Washington Correspondent Simon Marks reports.
IN: "In an 8 page…."
OUT: "….for obstruction"
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