[588] In February 2020, Stone was sentenced to 40 months in prison for lying to Congress and witness tampering regarding his attempts to learn more about hacked Democratic emails during the 2016 election. The sentencing judge said Stone "was prosecuted for covering up for the president".[589]

First impeachment
Main articles: First impeachment of Donald Trump and Trump-Ukraine scandal
Members of House of Representatives vote on two articles of impeachment (H.Res. 755), December 18, 2019
In August 2019, a whistleblower filed a complaint with the Inspector General of the Intelligence Community about a July 25 phone call between Trump and President of Ukraine Volodymyr Zelenskyy, during which Trump had pressured Zelenskyy to investigate CrowdStrike and Democratic presidential candidate Biden and his son Hunter, adding that the White House had attempted to cover-up the incident.[590] The whistleblower stated that the call was part of a wider campaign by the Trump administration and Giuliani that may have included withholding financial aid from Ukraine in July 2019 and canceling Pence's May 2019 Ukraine trip.[591]
House Speaker Nancy Pelosi initiated a formal impeachment inquiry on September 24.