The Speaker launched impeachment proceedings against President Trump

During this period, Pelosi was under pressure from members of her party to begin the process of impeaching Trump. This story was one of the most interesting facts about Nancy Pelosi. Many Democrats believed that some of the conclusions of an investigation into claims of Russian meddling in the 2016 election were sufficient to justify impeaching President Trump. When special counsel Robert Mueller wrapped up his investigation into claims of Russian meddling in the 2016 election, they intensified in March 2019. Although Mueller did not draw any legal conclusions, Trump's detractors thought the discoveries backed the president's impeachment, while the president's supporters thought he had been cleared.

Pelosi was initially hesitant to pursue impeachment, but in September 2019, it became known that a whistle-blower had filed a complaint alleging that Trump had withheld aid to Ukraine to persuade that nation to launch a corruption investigation into a political foe named Joe Biden. This revelation caused Pelosi to change her mind. Later that month, Pelosi formally launched the House's impeachment investigation. Early in December 2019, the investigation came to an end, and a few weeks later, the House voted to impeach the president. Pelosi didn't deliver the articles of impeachment to the Senate to the Senate until January, though. The motion was viewed as an effort to obtain specific terms for the Senate trial, and its outcome was disputed. Trump was cleared by the Senate in February 2020.