NPR Staff

Updated at 1:06 p.m. ET

William Taylor, acting U.S. ambassador to Ukraine, is presenting fresh information in the first public hearing of the impeachment inquiry into President Trump, telling lawmakers that Trump had asked Gordon Sondland, the U.S. ambassador to the European Union, about "the investigations" during a phone conversation that was witnessed by an aide to Taylor.

A senior State Department official testifying before the open-hearing phase of the impeachment inquiry into President Trump said Rudy Giuliani's "effort to gin up politically motivated investigations were ... infecting U.S. engagement with Ukraine."

The House has released the testimony of Catherine Croft, a Ukraine specialist with the State Department. The transcript is one of a number released ahead of the first public hearings of the impeachment inquiry into President Trump.

Foreign service officer Christopher Anderson's testimony has been released by Congress, as part of a new, public phase of the House impeachment inquiry into President Trump.

Anderson worked for U.S. envoy to Ukraine Kurt Volker and served as a special adviser for Ukraine negotiations from August 2017 through July 12, leaving days before a phone call between Trump and Ukrainian President Volodymyr Zelenskiy that helped trigger the inquiry.

Updated at 7:10 p.m. ET

The top Pentagon official who oversaw Russia and Eastern Europe told House impeachment investigators that Ukrainian officials had raised the issue of the suspension of security aid as early as August.

House investigators have released the deposition of Fiona Hill, who until earlier this year served as the top Russia policy specialist on the National Security Council.

Hill was said to have told investigators that she registered concerns about President Trump's policy to pressure the government of Ukraine in exchange for commitments to launch investigations that might help him in the 2020 election.

House investigators have released the testimony of Lt. Col. Alexander Vindman, a top specialist on Ukraine on the National Security Council.

Vindman is an Army foreign area officer and is believed to have listened in to the July 25 call in which President Trump asked his Ukrainian counterpart for the "favor" that would have involved investigations that could help Trump in the 2020 election.

That makes Vindman a key witness in House Democrats' impeachment inquiry.

House investigators have released the deposition by Deputy Assistant Secretary of State George Kent, who talked behind closed doors about the Ukraine affair.

According to those who heard his testimony, Kent told investigators that the White House picked "three amigos" — diplomats Gordon Sondland and Kurt Volker, and Energy Secretary Rick Perry — to run Ukraine policy.

House investigators have released the deposition by William Taylor, who runs the U.S. diplomatic mission in the Ukrainian capital of Kyiv.

Taylor, a career foreign policy specialist in the State Department, has been a central witness in the Ukraine affair. He described the intent by President Trump, as described by another diplomat, to put Ukraine's president "in a public box" committing to investigations that Trump thought might help him in the 2020 elections.

House investigators have released the deposition given behind closed doors by former Ambassador Kurt Volker, who served as a special U.S. envoy to Ukraine for its peace negotiations.

Volker was described by another witness as one of a trio of officials who had been commissioned by the White House to run a parallel policy for Ukraine outside of official channels.

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