That list is by no means exhaustive. In addition to other testimony before the HPSCI supporting these facts, the Acting Chief of Staff/Director of the Office of Management and Budget Mick Mulvaney stated during a press conference that the security assistance to Ukraine was withheld as a quid pro quo in exchange for Ukraine conducting an investigation into false allegations of Ukrainian interference in the 2016 election.

What then, is there left for the impeachment inquiry to prove?

In the face of this damning and conclusive evidence, the White House and House Republicans have been forced to retreat to their current defense: that President Trump himself has not been proven to have done anything wrong, because there was no witness who testified to having personally heard the President announce that he was seeking a quid pro quo from Ukraine, in exchange for release of the security assistance.

This “defense,” it should be noted, is hardly a defense at all. There is no dispute that the President used the powers of his office to coerce a foreign state into investigating a domestic political rival, nor is there any dispute that the Ukrainians were informed by the Trump administration that the hold on security assistance would not be lifted until these investigation were publicly announced. Multiple witnesses also testified that EU Ambassador Gordon Sondland had told them that, in his conversations with the president, Trump had described his requirement for Zelenskyy to publicly announce the investigations into Biden and 2016. However, to the extent that no witness testified to having personally heard Trump request a quid pro quo in regards to the security assistance, there are two reasons for this.