Topic: Alexander Vindman

President Donald Trump formally rescinded security clearances and access to classified information for 15 people, including former President Joe Biden, members of Biden's family, Hillary Clinton and Kamala Harris.

Returning Ukraine to its pre-2014 borders is an "unrealistic objective," U.S. Defense Secretary Pete Hegseth said Wednesday.

The Pentagon Inspector General's office found Wednesday that Trump administration officials illegally retaliated against the brother of a key witness in former President Donald Trump's first impeachment trial.

Retired Army Lt. Col. Alexander Vindman filed a lawsuit Wednesday accusing Donald Trump Jr., Rudy Giuliani and former Trump White House staffers of a conspiracy against him to obstruct a congressional proceeding.

Lt. Col. Alexander Vindman said he will retire from the military following a campaign of bullying and retaliation in response to his testimony in President Donald Trump's impeachment inquiry.

John Rood, the Defense Department undersecretary for policy who warned against withholding military aid to Ukraine, announced his resignation Wednesday.

President Donald Trump's legal team spent about 2 hours Saturday making their opening arguments in him impeachment trial.

Former U.S. special envoy to Ukraine Kurt Volker said Tuesday that the linking of a probe into Ukrainian energy company Burisma holdings to former Vice President Joe Biden was unacceptable.

Former U.S. Ambassador to Ukraine Marie Yovanovitch told lawmakers there's a "crisis" in the State Department during Friday's public impeachment hearing, saying the agency's "being hollowed out from within."

The impeachment inquiry of President Donald Trump moved into the open realm Wednesday with public testimony from two top U.S. diplomats, William Taylor and George Kent -- both of whom offered new details in the case.