2nd Week Of Open Impeachment Hearings Begin: Who Is Alexander Vindman?

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2nd Week Of Open Impeachment Hearings Begin: Who Is Alexander Vindman?
Lt. Col. Alexander Vindman is one of the eight witnesses scheduled to testify during the second week of public impeachment hearings.
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Lt. Col. Alexander Vindman is one of the eight witnesses scheduled to testify during the second week of public impeachment hearings.

The hearings will take place over three days. Vindman is set to testify Tuesday morning. But before the impeachment inquiry, he wasn't exactly a household name. Here's a look at his background:

He fled Ukraine and came to the U.S. when he was 3 years old with his brothers, father and grandmother. He and his twin brother later enlisted in the U.S. Army and started careers in government. Right now, he's the top Ukraine expert on the White House's National Security Council.  

So, why exactly is he considered a key witness in the impeachment investigation into President Donald Trump? Vindman listened in on the July 25 phone call between President Donald Trump and Ukraine's president — the one that sparked a whistleblower complaint that led to the impeachment investigation. In that call, President Trump asked Ukraine to investigate the Bidens.

Earlier this month, House investigators released the transcript of Vindman's closed-door testimony. He told lawmakers "there was no doubt" about what President Trump was asking for during the call. He also said he was concerned about the call and "immediately" reported his concerns to National Security Council's lawyer.

Vindman also told lawmakers about a July 10 meeting where U.S. Ambassador to the European Union Gordan Sondland asked Ukrainian officials to investigate the Bidens in order to secure a meeting with President Trump.

Jennifer Williams, Vice President Mike Pence's special adviser on Europe and Russia, is also scheduled to testify publicly on Tuesday morning. 

Additional reporting from Newsy affiliate CNN