Ukraine

In an open letter, influential conservatives urge President Trump to keep his embattled chief of staff and remove the "acting" from his title.

Energy Secretary Rick Perry urged President Trump to make that now-infamous July phone call to Ukrainian President Volodymyr Zelenskiy. But what's Perry's connection to Ukraine?

Lev Parnas and Igor Fruman were arrested at Dulles airport holding one-way tickets out of the country. Their case begins amid the inquiry into President Trump's alleged political pressure on Ukraine.

Ambassador William Taylor said U.S. aid to Ukraine was contingent on the country undertaking investigations that would help President Trump politically. Here are key parts of his written statement.

With the debate's second question, the former vice president got a chance to respond to President Trump's accusations.

Marie Yovanovitch was recalled from her post in May after criticism from some Republicans, including the president's eldest son, that she was not supportive of the administration's policies.

Ukrainian President Volodymyr Zelenskiy is trying to fulfill a campaign pledge to end a five-year conflict in eastern Ukraine. A Russian-backed insurgency has cost more than 13,000 lives since 2014.

Attorney Mark Zaid, who is also part of the initial whistleblower's legal team, tells NPR that a new whistleblower has talked to the inspector general of the intelligence community.

A new top prosecutor will review 15 dropped corruption investigations involving the owner of a gas firm on whose board Hunter Biden sat. Ruslan Ryaboshapka says he knows of no evidence against Biden.

Burisma Group, the company where former Vice President Joe Biden's son Hunter served on the board of directors, keeps a low profile even as it promotes itself as a major natural gas producer.

NPR's Scott Simon reflects on the television show parallels of President Trump and Ukrainian President Volodymyr Zelenskiy, and the call between them at the center of an impeachment inquiry.