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

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.

However it was during Trump’s first impeachment trial that he rose to prominence – giving evidence about phone calls in 2019 in which the President appeared to pressure Volodomyr Zelenskyy to ...

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

Former Director of European Affairs for the U.S. National Security Council Lieutenant Colonel Alexander Vindman joins Ali ...

Col. Alexander Vindman, the National Security Council staffer set to deliver dramatic testimony confirming that President Donald Trump sought dirt from Ukraine on a political rival, is a Jewish ...

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

Despite facing impeachment in his first term for trying to extract favors from Ukraine, Donald Trump is once again pressuring Ukraine to deliver something in exchange for military aid in its war ...

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 ...