The audio is of a July 2019 phone call between Giuliani, US diplomat Kurt Volker, and Andriy Yermak, a senior adviser to Ukrainian President Volodymyr Zelensky. The call was a precursor to Trump’s infamous call with Zelensky, and both conversations later became a central part of Trump’s first impeachment, where he was accused of soliciting Ukrainian help for his campaign, CNN reported.

During the roughly 40-minute call, Giuliani repeatedly told Yermak that Zelensky should publicly announce investigations into possible corruption by Biden in Ukraine, and into claims that Ukraine meddled in the 2016 election to hurt Trump (These separate claims are both untrue), CNN said.

“All we need from the President [Zelensky] is to say, I’m gonna put an honest prosecutor in charge, he’s gonna investigate and dig up the evidence, that presently exists and is there any other evidence about involvement of the 2016 election, and then the Biden thing has to be run out,” Giuliani said, according to the audio published by CNN. “… Somebody in Ukraine’s gotta take that seriously.”

The new audio demonstrates how Giuliani aggressively cajoled the Ukrainians to do Trump’s bidding. And it undermines Trump’s oft-repeated assertion that “there was no quid pro quo” where Zelensky could secure US government support if he did political favors for Trump, the news organisation said.