On October 1, Secretary Pompeo responded to the Committees, refusing to make Ambassador Volker available on the requested date.390 On October 2, the Department of State wrote a letter to Ambassador Volker's counsel instructing Ambassador Volker not to reveal classified or privileged information and prohibiting Ambassador Volker from producing any government documents.391
On October 2, Ambassador Volker produced copies of text messages in response to the Committees' request.392 On October 3, Ambassador Volker voluntarily participated in a transcribed interview.393 In addition, on November 19, Ambassador Volker testified voluntarily at a public hearing.394
Jennifer Williams, Special Advisor for
Europe and Russia, Office of the Vice President
On November 4, 2019, the Committees sent a letter to Jennifer Williams seeking her testimony at a deposition on November 7.395 On November 7, the Committees sent Ms. Williams a subpoena seeking her testimony the same day.396 Ms. Williams complied.397 On November 11, Ms. Williams sent a letter to Chairman Schiff to make one amendment to her deposition testimony.398 In addition, on November 19, the Committees conveyed a subpoena seeking Ms. William's testimony at a public hearing on November 19.399 Ms. Williams also complied with this subpoena and testified at the public hearing.400
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