Link , Link , Link , Link , Link , Link , Link , [Since the 3 November election, Mr Trump has repeatedly made unsubstantiated claims of widespread voter fraud, and members of his legal defence team have spoken of an alleged international plot to hand President-elect Joe Biden the win. Last week, Mr Trump attacked Mr Barr on Twitter, claiming that he did not publicly reveal that Mr Biden's son Hunter was being investigated by the justice department. Hunter Biden has since confirmed that his tax affairs are being looked into. Mr Trump claimed the decision not to reveal the investigation was a "big disadvantage" for the Republicans at the polls. President Trump's announcement of Mr Barr's departure came at the same time the US electoral college affirmed Mr Biden's presidential election victory, one of the final steps required for him to take office.]