Washington (CNN)President Donald Trump’s acknowledgment that he discussed former Vice President Joe Biden in a July call with Ukraine’s president has intensified scrutiny on his interactions and decisions on Ukraine.
On Friday CNN reported Trump pressed Ukrainian President Volodymyr Zelensky in the call to investigate former Vice President Joe Biden’s son, Hunter, according to a person familiar with the situation. That call was also part of a whistleblower complaint submitted to the Intelligence Community Inspector General, another person familiar with the situation told CNN.There is no evidence of wrongdoing by either Joe or Hunter Biden.Trump previously branded criticism of the call a “Ukrainian Witch Hunt,” while Biden accused the President of abusing his power to “smear” him. On Sunday, the President said he hopes officials release details of the call, but slammed the whistleblower responsible for filing a complaint.Below is a timeline of recent key events and stories surrounding Trump, Ukraine and the intelligence whistleblower.Read MoreKey eventsMay: Rudy Giuliani flirts with going to Ukraine — then says he isn’t going to go after criticism.July 10-11: Oleksandr Danylyuk, Secretary of Ukraine’s National Security and Defense Council, visits the White House, Pentagon and the State Department.July 24: Special counsel Robert Mueller testifies to Congress.July 25: Trump and Ukrainian President Volodymyr Zelensky talk by phone. In September it is reported that Trump pressed Zelensky to investigate Democratic presidential candidate Joe Biden’s son on the call and Trump later acknowledged Joe Biden was discussed. “We had a great conversation. The conversation I had was largely congratulatory, was largely corruption — all of the corruption taking place, was largely the fact that we don’t want our people like Vice President Biden and his son (adding to the corruption),” Trump told reporters on Sunday. In a readout of the call, the Ukraine government referenced discussion of investigating corruption, but the White House version makes no mention — saying only that Trump was congratulating Zelensky on his recent election.July 28: Trump announces that Director of National Intelligence Dan Coats will retire.August: Giuliani says he spoke to a representative for Zelensky by phone and in personAugust 8: Trump announces deputy Director of National Intelligence Sue Gordon will depart the administration.August 12: A whistleblower files a complaint with the intelligence inspector general.August 15: Gordon and Coats depart the Office of Director of National Intelligence.August 26: Intelligence IG forwards complaint to the acting DNI.August 28: Then-national security adviser John Bolton meets with Zelensky in Kiev.August 30: Trump considers blocking $250 million in military aid to Ukraine, effectively pausing disbursement of the funds during a formal review process.September 1: Vice President Mike Pence meets with Zelensky in Warsaw.September 2: Deadline for DNI to send whistleblower complaint to Congress — he does not send it.September 9: Intel IG notifies House Intelligence Chairman Adam Schiff of an “urgent concern” that DNI has overruled.September 9: Three House committees launch investigation of efforts by Trump, Giuliani and others to pressure the Ukrainian government to assist the President’s reelection efforts. The committees request information about Trump’s July phone call with Zelensky.September 10: Schiff demands acting DNI turn over the complaint.September 12: The administration hold on Ukraine aid is lifted.September 13: Schiff subpoenas the acting DNI.September 17: The acting DNI refuses to testify.September 17: Secretary of State Mike Pompeo talks to the Ukrainian foreign ministerSeptember 18: Revelation is reported that the complaint involves a Trump communication with a foreign leader and a “promise” made.September 18: The Intelligence inspector general and the acting DNI say they will brief the House Intelligence Committee.September 18: Pence talks to Ukrainian President Zelensky by phone.September 19: The Intelligence inspector general gives a classified briefing to the House Intelligence Committee.September 19: It is revealed by The Washington Post and The New York Times that the whistleblower’s concern was partly in regard to Ukraine.September 20: It’s reported that Trump pressed Zelensky to investigate Biden’s son during a call on July 25.September 22: Trump acknowledges that he discussed Joe Biden in a July call with Zelensky.September 22: House Speaker Nancy Pelosi writes to the acting DNI stating that if the administration refusals continue, it would constitute a “serious possible breach of constitutional duties by” Trump and would take Congress “into a whole new stage of investigation.”UpcomingSeptember 25: Trump meets with Ukraine President Zelensky at the United Nations General Assembly.September 26: The acting DNI to brief House Intelligence Committee.