U.S. President Donald Trump has said that the best evidence of his rightness is a statement by Ukrainian leader Volodymyr Zelensky that no pressure was exerted on him during a July 25 phone call.
"The President of Ukraine said that he was not pressured by me to do anything wrong. Can't have better testimony than that! As V.P., Biden had his son, on the other hand, take out millions of dollars by strong arming the Ukrainian President. Also looted millions from China. Bad!" he wrote on his Twitter account.
The President of Ukraine said that he was NOT pressured by me to do anything wrong. Can’t have better testimony than that! As V.P., Biden had his son, on the other hand, take out millions of dollars by strong arming the Ukrainian President. Also looted millions from China. Bad!
— Donald J. Trump (@realDonaldTrump) 26 сентября 2019 г.
A whistleblower complaint about a phone conversation between Trump and Zelensky caused a worsening of the domestic political situation in the United States. It also gave a formal reason to launch the impeachment procedure against President Trump.