Trump in a July phone call repeatedly pressured the president of Ukraine to investigate Democratic presidential candidate Joe Biden ’s son, urging Volodymyr Zelensky about eight times to work with Rudy Giuliani, his personal lawyer, on a probe, according to people familiar with the matter.

Ukraine’s prosecutor general said in May that he had no evidence of wrongdoing by Joe Biden or Hunter Biden.

https://www.wsj.com/articles/trump-defends-conversation-with-ukraine-leader-11568993176

Trump in a July phone call repeatedly pressured the president of Ukraine to investigate Democratic presidential candidate Joe Biden ’s son, urging Volodymyr Zelensky about eight times to work with Rudy Giuliani, his personal lawyer, on a probe, according to people familiar with the matter.

“He told him that he should work with [Mr. Giuliani] on Biden, and that people in Washington wanted to know” whether allegations were true or not, one of the people said. Mr. Trump didn’t mention a provision of foreign aid to Ukraine on the call, said this person, who didn’t believe Mr. Trump offered the Ukrainian president any quid-pro-quo for his cooperation on any investigation.

Mr. Giuliani in June and August met with top Ukrainian officials about the prospect of an investigation, he said in an interview. The Trump lawyer has suggested Mr. Biden as vice president worked to shield from investigation a Ukrainian gas company with ties to his son, Hunter Biden. A Ukrainian official earlier this year said he had no evidence of wrongdoing by Mr. Biden or his son.

After the July call between the two presidents, the Ukrainian government said Mr. Trump had congratulated the new president on his election and expressed hope that his government would push ahead with investigations and corruption probes that had stymied relations between the two countries.

https://www.president.gov.ua/en/news/volodimir-zelenskij-proviv-telefonnu-rozmovu-z-prezidentom-s-56617

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https://www.cnbc.com/2019/09/20/trump-urged-ukraine-president-to-investigate-joe-bidens-son.html

Donald Trump repeatedly urged Ukraine’s president during a telephone call in July to investigate former Vice President Joe Biden’s son Hunter and his involvement with a Ukraine natural gas company, a new report says.

The Wall Street Journal reported that Trump encouraged Ukraine President Volodymyr Zelensky “about eight times to work with Rudy Giuliani, his personal lawyer, on a probe, according to people familiar with the matter.”