Factbox: The Trump impeachment inquiry: What we've learned so far

Testimony by Trump administration officials past and present, a rough transcript of the phone call released by the White House, texts between U.S. diplomats and other documents have largely confirmed the whistleblower's account.Trump denies wrongdoing and says he is the victim of a witch hunt by Democrats.- A rough transcript of the call on July 25 between Trump and Zelenskiy confirmed the whistleblower's most damaging allegation: that Trump asked Zelenskiy to investigate whether Biden, while vi