Article snippet: WASHINGTON — White House officials took extraordinary steps to ‘‘lock down’’ information about President Trump’s summertime phone call with the president of Ukraine, even moving the transcript to a secret computer system, a whistle-blower alleges in a politically explosive complaint that accuses the administration of a wide-ranging cover-up. The whistle-blower, in a 9-page document released Thursday , provides many new details about the circumstances of the phone call in which Trump repeatedly spoke of how much the US had aided Ukraine and encouraged new President Volodymyr Zelenskiy to help investigate political rival Joe Biden and his son. Accusations of efforts to pressure the leader of a foreign nation to dig for dirt on a potential 2020 Trump rival are now at the heart of a House impeachment inquiry against the president. The whistle-blower’s official complaint alleges a concerted White House effort to suppress the transcript of the call and describes a shadow campaign of diplomacy by the president’s personal lawyer Rudy Giuliani that worried some senior administration officials. ‘‘In the days following the phone call, I learned from multiple US officials that senior White House officials had intervened to ‘lock down’ all the records of the phone call, especially the official word-for-word transcript of the call that was produced as is customary by the White House situation room,’’ the complaint says. The previously secret document, with its detail and clea... Link to the full article to read more