Whistleblower's complaint against Pres Trump released

The whistleblower's complaint at the centre of impeachment proceedings against President Donald Trump has been declassified and released. In the seven-page complaint, the whistleblower says Mr Trump tried to pressure Ukraine to interfere in the 2020 presidential election by investigating his rival Joe Biden, and senior White House officials attempted to cover it up. We speak to Washington DC correspondent, Simon Marks.