One of the most prolific figures to emerge out of President Trump's impeachment saga is questioning what Vladimir Putin has on the commander in chief.

NPR's Mary Louise Kelly talks with retired Lt. Colonel and former Trump staffer Alexander Vindman on Russia, Ukraine and his new book.

Trump says the U.S. and Ukraine have reached agreement on a rare earth minerals deal. Alexander Vindman joins to discuss that and more.

A key witness in Donald Trump's first impeachment saga suggested Tuesday that the U.S. president might have been compromised ...

Obama officials and Trump critics spoke harshly of U.S. Defense Secretary Pete Hegseth after he took returning Ukraine to its ...

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

Supporters of Ukraine and members of the Ukrainian community hold a ... [+] rally to mark the one-year anniversary of ...

The Trump administration is facing widespread criticism for aligning with authoritarian regimes—including Russia, North Korea ...

Russia and the US have agreed to nominate negotiating teams to explore a peace deal for Ukraine but how much can really be ...

Alexander Vindman, a Trump impeachment witness and ... "This will embolden Putin and undermine the interests of peace in Ukraine and Europe. A major blow to U.S. national security," Vindman ...

The comments amounted to a major reorientation of US policy as President Donald Trump looks for ways to bring the war in ...