This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.WASHINGTON, D.C. – A White House aide tells lawmakers that what he heard on a July phone call between President Donald Trump and the new Ukrainian president was “improper.” Lt. Col. Alexander Vindman is testifying Tuesday in a public hearing in the House impeachment inquiry into Trump’s pressure on Ukraine to investigate his Democratic political rivals as he withheld aid to the East European nation. Vindman is a U.S. Army officer detailed to the National Security Council. He listened in on the July 25 call at the center of the impeachment inquiry. Trump asked the new Ukrainian president to look into whether Ukraine interfered in the 2016 election and wanted the country to investigate Joe Biden and his son Hunter. Vindman said it was “improper” for Trump to demand a foreign government investigative a U.S. citizen and political opponent. Lt. Col. Alexander Vindman, a National Security Council official, says his military experience shapes how he views a phone call between President Donald Trump and his Ukrainian counterpart. Vindman said at Tuesday’s impeachment hearing that he believed Trump was demanding that Ukrainian President Volodymyr Zelenskiy undertake an investigation into Trump’s Democratic rival Joe Biden even if Trump didn’t phrase it as a demand. Vindman says that in the military, when someone senior “asks you to do something, even if it’s polite and pleasant, it’s not to be taken as a request. It’s to be taken as an order.” Vindman says that he doesn’t think the omission of the word “Burisma” from the transcript of a July 25 call between President Donald Trump and Ukraine’s new president was significant. Lt. Col. Alexander Vindman says he thinks the people who do transcripts may not have caught the word. He said they put in “company” instead. Burisma is a Ukrainian gas company affiliated with the son of Joe Biden. He said that he tried to edit the transcript of the call to note the word “Burisma” but it didn’t make it into the rough transcript released publicly. He doesn’t know why. Vindman said he thought President Volodymyr Zelenskiy may have been prepped for the call because he didn’t think the new leader would know about it otherwise. Vindman is one of several witnesses coming before the committee this week. He and the other witnesses have already testified behind closed doors. Trump has denied doing anything wrong. An adviser to Vice President Mike Pence says she found a July phone call between President Donald Trump and the Ukraine leader “unusual” since it “involved discussion of what appeared to be a domestic political matter.” Jennifer Williams was at the witness table Tuesday as the House intelligence public hearing got underway. The House impeachment inquiry is looking into the Trump administration’s interactions with Ukraine. She listened to the July 25 call between Trump and Ukraine president Volodymyr Zelenskiy. She says that after the call, she provided an update in the vice president’s daily briefing book indicating that the conversation had taken place. Williams says she did not discuss the call with Pence or any of her colleagues in the office of the vice president or the National Security Council. The House intelligence panel is holding public hearings into Trump’s pressure on Ukraine to investigate his Democratic political rivals while also withholding aid to the Eastern European nation. An adviser to Vice President Mike Pence says she was told that White House acting chief of staff Mick Mulvaney had directed that a hold on military aid to Ukraine should remain in place. Jennifer Williams is testifying Tuesday in the House impeachment inquiry into the Trump administration’s interactions with Ukraine. Williams says she attended meetings earlier this year in which the hold on Ukraine security assistance was discussed. She says representatives of the State and Defense departments advocated that the hold on the aid should be lifted, and that budget officials said that Mulvaney had directed that it remain in place. Williams says she learned on Sept. 11 that the hold had been lifted. She says she’s never learned what prompted that decision. The House intelligence panel is conducting public hearings into President Donald Trump’s pressure on Ukraine to investigate Democratic rival Joe Biden and his son Hunter, while also withholding security aid to the Eastern European nation. After they appear Tuesday morning, the House will hear in the afternoon from former NSC official Timothy Morrison and Kurt Volker, the former Ukraine special envoy.