Donald Trump continues to froth over the impeachment inquiry on Twitter as Laura Cooper, deputy assistant US secretary of defence for Russia, Ukraine and Eurasia, becomes the latest senior official to appear before the House panel on Capitol Hill to testify about the conduct of diplomatic relations with Ukraine.On Tuesday, Bill Taylor, acting US ambassador to Ukraine, told the inquiry he was informed military aid to the country was “dependent” on president Volodymyr Zelensky agreeing to publicly announce a corruption probe into Donald Trump’s 2020 rival Joe Biden, confirming the existence of the suspected quid pro quo at the heart of the Democratic-led investigation.
