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Photo: Pavlo Gonchar/SOPA Images/LightRocket via Getty Images

Former U.S. special envoy to Ukraine Kurt Volker, who resigned last week, will appear in a deposition on Thursday as part of the House Intelligence Committee's impeachment investigation, a committee official confirmed to Axios.

Why it matters: Secretary of State Mike Pompeo sent a letter to top House Democrats on Thursday claiming that the deposition dates they had scheduled for 5 former and current State Department officials were "not feasible." Former U.S. Ambassador to Ukraine Marie Yovanovitch, who was scheduled to appear on Wednesday, will now be appearing on Oct. 11 with the agreement of both the committees conducting the Ukraine investigation and her counsel, per the official.

The big picture: The whistleblower complaint that help set off House Democrats' impeachment investigation names Volker as one of the Trump administration figures potentially involved in Rudy Giuliani's alleged scheme to push Ukraine to investigate Joe Biden.

  • A day after the now-infamous phone call between Trump and Ukrainian President Volodymyr Zelensky, the whistleblower said that Volker and U.S. Ambassador to the EU Gordon Sondland met with Ukrainian officials and provided them with advice on how to "navigate" Trump's demands.

Go deeper: House chairs accuse Pompeo of "stonewalling" in Ukraine investigation

Go deeper

USAID chief tests positive for coronavirus

An Air Force cargo jet delivers USAID supplies to Russia earlier this year. Photo: Mikhail Metzel/TASS via Getty Images

The acting administrator of the United States Agency for International Development informed senior staff Wednesday he has tested positive for coronavirus, two sources familiar with the call tell Axios.

Why it matters: John Barsa, who staffers say rarely wears a mask in their office, is the latest in a series of senior administration officials to contract the virus. His positive diagnosis comes amid broader turmoil at the agency following the election.

Bryan Walsh, author of Future
3 hours ago - Health

COVID-19 shows a bright future for vaccines

Illustration: Annelise Capossela/Axios

Promising results from COVID-19 vaccine trials offer hope not just that the pandemic could be ended sooner than expected, but that medicine itself may have a powerful new weapon.

Why it matters: Vaccines are, in the words of one expert, "the single most life-saving innovation ever," but progress had slowed in recent years. New gene-based technology that sped the arrival of the COVID vaccine will boost the overall field, and could even extend to mass killers like cancer.

5 hours ago - Health

Beware a Thanksgiving mirage

Illustration: Sarah Grillo/Axios

Don't be surprised if COVID metrics plunge over the next few days, only to spike next week.

Why it matters: The COVID Tracking Project warns of a "double-weekend pattern" on Thanksgiving — where the usual weekend backlog of data is tacked on to a holiday.