İrem UZUN -TDO- Alexander Vindman, an Army lieutenant colonel and former diplomat who later became the director of European affairs on the National Security Council (NSC), said he had listened in on Trump's July 25 call with Ukrainian President Volodymyr Zelensky from the Situation Room with fellow National Security Council (NSC) officials.
U.S. President Donald Trump's top adviser on Ukraine is set to testify on Tuesday that he told a government lawyer about concerns that US national security could be undermined after a phone call between Trump and Ukraine's president. According to his testimony, Lt. Col. Vindman had twice reported his "concerns" to the White House after US officials including Mr. Trump had discussed demanding Ukraine announce an investigation into former Vice President Joe Biden in exchange for a meeting with Mr. Trump and military aid.
Mr. Vindman also said "I realized that if Ukraine pursued an investigation into the Bidens and Burisma, it would likely be interpreted as a partisan play which would undoubtedly result in Ukraine losing the bipartisan support it has thus far maintained. This would all undermine US national security."
Democrats have argued that, in the phone call, Mr. Trump offered a "quid pro quo" to the Ukrainian leader - investigate Mr. Biden for alleged corruption and the US would release $400 million in military aid to Ukraine. Mr. Trump has denied the accusation.