READ: Transcript of testimony by top US diplomat in Ukraine William Taylor

READ: Transcript of testimony by top US diplomat in Ukraine William Taylor
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House Democrats on Wednesday released the transcript of William Taylor's closed-door testimony in the impeachment probe into President TrumpDonald John TrumpFive takeaways from the Democratic debate As Buttigieg rises, Biden is still the target Leading Democrats largely pull punches at debate MORE.

Taylor, the top U.S. diplomat in Ukraine, was the first official to testify that a quid pro quo existed, with the Trump administration withholding Ukrainian military aid while requesting that Ukraine launch politically motivated investigations into interference in the 2016 election and former Vice President Joe BidenJoe BidenFive takeaways from the Democratic debate As Buttigieg rises, Biden is still the target Leading Democrats largely pull punches at debate MORE and his son Hunter.

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"That was my clear understanding, security assistance money would not come until the President committed to pursue the investigation," Taylor said in the testimony, referring to Ukrainian President Volodymyr Zelensky.

Taylor is also scheduled to testify publicly next week, as the impeachment probe enters its next phase. Democrats are releasing transcripts from the closed-door phase of their probe in batches this week.

Read Taylor's full testimony transcript here or below: