As the top Republican ("Ranking Member") on the House Intelligence Committee, Nunes was a key player in the Trump impeachment inquiry. During the November 2019 public hearings, he delivered the opening statement for the GOP minority. Nunes used most of the allotted Republican time for questioning himself instead of deferring to the Minority Counsel. Nunes has tried to identify the whistle-blower whose complaint played a part in launching the impeachment inquiry. Further, during the hearings, Nunes repeatedly claimed that Ukraine had attempted to influence the 2016 United States presidential election, one of the conspiracy theories related to the Trump–Ukraine scandal.