• In 2014, Vice President Joe Biden is responsible for supporting the newly appointed government in Ukraine and for ensuring that Ukraine fights corruption in the country.
• Hunter Biden, son of the presidential candidate and former Vice President Joe Biden works as a lawyer and lobbyist. He has connections to Ukraine by being a board member of the Ukrainian gas company Burisma. A position he held between 2014 and 2019.
• The founder of Burisma was part of the government that overthrew the revolution in Ukraine in 2014. In connection with the new administration, corruption is beginning to be investigated in Ukraine - and with former government members, according to the Bloomberg news site.
• US increases pressure on Ukraine. The country threatens to retain a $ 1 billion loan guarantee if the country no longer works against corruption. Among other things, with demands that a prosecutor in the case, Viktor Shokin, be fired. Something that has recently led the Trump administration to suspect that the Obama administration's claim was due to the Prosecutor, among others, investigating the gas company Burisma.
• On July 25 this year, Donald Trump has had a conversation with current Ukrainian President Volodomyr Zelenskyj. During the conversation, the US president should have asked him for a post. The service was based on investigating rumors that Joe Biden had a role in stopping a prosecution against his son, who previously held a board position in Burisma.
• Three days after this call, Dan Coats resigns as national intelligence manager.
• According to CNN, Sue Gordon, who was Deputy Chief of Dan Coats, also quit her role as intelligence chief three weeks later. Joseph Maguire becomes acting head of the US intelligence service.
• August 12, a whistle-blower notification comes in to the intelligence service's General Inspector Michael Atkinson. Several media reports that Atkinson describes the report as worrying and that it has to do with Ukraine.
• After reviewing the report and finding the whistleblower information credible, Atkinson forwarded it to the acting chief of national intelligence, Joseph Maguire. He prohibits Atkinson from communicating to Congress the contents of the letter.
• Donald Trump writes on Twitter on September 20 that he has made no mistake in his conversation with his Ukrainian counterpart.
• On September 22, the New York Times reports with several other media that Trump admits he has discussed Joe Biden's son with the President of Ukraine in the July 25 phone call. He should not have commented on the information that he should have pressed the Ukrainian president.
• Over the past month, pressure on the Trump administration is increasing to get them to release the written down content from the July 25 call. Voting to bring Donald Trump to court is intensified again. Among other things from Congressman Alexandria Ocasio-Cortez.
• On September 24 , Trump announces that the White House will release the call in its entirety. Later in the day, Congress spokesman Democrat Nancy Pelosi announces that an investigation into Donald Trump has begun in court.
• On September 25, the White House releases a compressed print of the conversation between the US and Ukraine President. At a press conference, the Ukrainian president stressed that he had not been pressured by Donald Trump to do anything.
• On September 26, the whistleblower notification will be made public. According to the report, the person in question received several statements that Donald Trump must have been pressuring him to investigate Democrat Joe Biden's son and that the White House was trying to keep secret evidence of the conversation in question.