Washington sources reported that a national security aide to Vice President Mike Pence arrived in congress on thursday to testify in the impeachment inquiry against President donald trump as momentum in the investigation picked up ahead of next week's open hearings. Meanwhile Jennifer Williams listened to Trump's controversial July 25 phone call with ukraine leader Volodymyr Zelensky, and could either support or dampen allegations that trump abused his powers by pressuring Zelensky to investigate Trump's possible 2020 election rival.
Furthermore democrats allege that trump held up $391 million in military aid for ukraine to force Zelensky to find dirt on Democrat Joe Biden, and also to find evidence supporting a widely discredited theory that ukraine helped Democrats in the 2016 election. Apparently a veteran diplomat who advises Pence on europe and russia, Williams will be the first person from the vice president's office to testify. trump has defended the July call as "perfect" despite a heavily edited transcript appearing to support the allegations against him.
Moreover the call record shows trump asked Zelensky for a "favor" and specified that ukraine should open investigations into Biden, as well as into the unsupported tale that ukraine helped the Democrats in 2016 and hence that closely matched the claims of an intelligence community whistleblower, whose anonymous august complaint that Trump's actions in the call were improper sparked the impeachment probe.