Lt. Col. Alexander Vindman, the top Ukraine expert on the National Security Council, told House impeachment investigators “there was no doubt” what President Donald Trump was demanding during his July 25 call with Ukrainian President Volodymyr Zelenskiy.

During that conversation, now central to House Democrats’ impeachment inquiry, Trump pressed Zelenskiy to launch investigations involving former Vice President Joe Biden and his son Hunter Biden as well as a conspiracy related to the 2016 U.S. election, according to the record of the call released by the White House.

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