President Donald Trump asked his Ukrainian counterpart to investigate former vice-president Joe Biden and his son, according to a White House memorandum of a call between the leaders.
Mr Trump had said a transcript of the call, which has sparked an impeachment inquiry, would prove he did not try to pressure Volodymyr Zelensky by threatening to withhold nearly $400m in military aid.
While the memorandum provided by note takers in the White House Situation Room contained no direct evidence that Mr Trump said he would withhold the money, it revealed that he asked the Ukrainian president to talk to William Barr, his attorney-general, and Rudy Giuliani, his personal lawyer, about Hunter Biden and his father.