NEW: Lt. Col. Vindman's Testimony - WH transcript of Trump's Ukraine call omitted crucial words & phrases

Lt. Col. Alexander S. Vindman, the top Ukraine expert on the National Security Council, told House impeachment investigators on Tuesday that the White House transcript of a July call between President Trump and Ukraine’s president omitted crucial words and phrases, and that his attempts to include them failed.

Colonel Vindman’s account offered a hint to solving a mystery surrounding the conversation: what Mr. Trump’s aides left out of the transcript in places where ellipses indicated dropped words.

The omissions, Colonel Vindman said, included Mr. Trump’s assertion that there were recordings of former Vice President Joseph R. Biden Jr. discussing Ukraine corruption, and an explicit mention by Ukraine’s president, Volodymyr Zelensky, of Burisma Holdings, the energy company whose board employed Mr. Biden’s son Hunter.

Colonel Vindman did not testify to a motive behind the editing process. But his testimony is likely to drive investigators to ask further questions about how officials handled the call, including changes to the transcript and the decision to put it into the White House’s most classified computer system — and whether those moves were meant to conceal the conversation’s most controversial aspects.

In hours of questioning on Tuesday by Democrats and Republicans, Colonel Vindman recounted his alarm at the July 25 call, saying he “did not think it was proper” for Mr. Trump to have asked Mr. Zelensky to investigate a political rival, and how White House officials struggled to deal with the fallout from a conversation he and others considered problematic.

His testimony about the reconstructed transcript, the aftermath of the call and a shadow foreign policy being run outside the National Security Council came as Democrats unveiled plans for a more public phase of the impeachment process.

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