April 21, 2019
Ukraine Reform: Volodymyr Zelensky is elected president of Ukraine.
May 14, 2019
Ukraine Reform: President Trump cancels Vice President Pence’s planned trip to Zelensky’s inauguration.
May 20, 2019
Ukraine Reform: Zelensky inauguration is attended by U.S. delegation led by Secretary Perry.
July 18, 2019
Aid to Ukraine: The Office of Management and Budget suspends military aid to Ukraine under orders from President Trump.
July 21, 2019
Ukraine Reform: Ukraine holds parliamentary elections, President Zelensky’s party wins the majority of seats.
July 25, 2019
Trump Phone Call: President Trump calls President Zelensky and asks him to investigate election interference and the firing of the Ukrainian prosecutor looking into Hunter Biden.
August 12, 2019
Impeachment Inquiry: A whistleblower submits a complaint to the inspector general of the intelligence community.
August 29, 2019
Ukraine Reform: President Zelensky demands the parliament introduce reform legislation at the opening speech of legislature.
August 30, 2019
Aid to Ukraine: Gordon Sondland, Ambassador to the E.U., tells Senator Ron Johnson the aid is being withheld as a quid pro quo for reopening investigations.
August 31, 2019
Aid to Ukraine: Senator Johnson calls President Trump about the quid pro quo, Trump explicitly rejects the claim.
September 9, 2019
Aid to Ukraine: A text message from Sondland says there is no quid pro quo, and the hold is to evaluate whether Ukraine will adopt the reforms.
Impeachment Inquiry: The House Permanent Select Committee on Intelligence is made aware of the whistleblower report.
September 11, 2019
Aid to Ukraine: Aid sent to Ukraine.
September 12, 2019
Impeachment Inquiry: The House Judiciary Committee votes to begin an impeachment inquiry.
September 25, 2019
Impeachment Inquiry: The whistleblower complaint is given to the House Intelligence Committee.
September 26, 2019
Impeachment Inquiry: A partially redacted version of the whistleblower complaint is released to the public.
October 3, 2019
Impeachment Inquiry: The House committees begin interviewing officials regarding the impeachment inquiry.
December 18, 2019
President Trump is Impeached: The House of Representatives voted to approve two articles of impeachment against President Trump. The House voted 230-197-1 (present) to charge Trump with abuse of power and 229-198-1 to charge him with obstruction of Congress.
December 19, 2019
Republican Response: In a speech, Senate Majority Leader Mitch McConnell denounced the “purely partisan impeachment” that he said could “unsettle the foundations of our republic.”
Democrat Delay: House Speaker Nancy Pelosi said she won’t send the articles to the Senate until the upper chamber finalizes its plans for a trial.
January 15, 2020
House managers file written legal briefs with the Senate.
January 16, 2020
White House legal team files written legal briefs with the Senate.