For Biden, Ukraine Is a ‘Déjà Vu’ Problem That’s Hard to Fix. United States International Relations, Defense and Military Forces, Trump-Ukraine Whistle-blower Complaint and Impeachment Inquiry, Rand Corp, State Department, Center for Strategic and International Studies, Biden, Joseph R Jr, Blinken, Antony J, Pompeo, Mike, Tefft, John F, Kyiv (Ukraine), Ukraine