Lt Col Alexander Vindman told Congress that President Donald Trump made "inappropriate" political demands of the Ukrainian president. "I couldn't believe what I was hearing," Col Vindman said. The hearings are investigating whether Mr Trump abused his presidential power. A decorated Iraq war veteran who serves in a senior role on the US National Security Council (NSC), Col Vindman testified before the House on Tuesday in his Army dress uniform. As he described his reaction to hearing a call between President Trump and his Ukranian counterpart, President Volodymyr Zelensky, Col Vindman came under attack by the official White House Twitter account, which posted a critical quote from his former boss on the NSC questioning his judgement.
