Yaroslav Trofimov is the chief foreign affairs correspondent for the Wall Street Journal and author of the new book "Our Enemies Will Vanish: The Russian Invasion and Ukraine's War of Independence."  Yaroslav Trofimov is a veteran journalist who has covered conflicts around the world. He also happens to have been born and raised in Ukraine. In the book, he offers a first-hand account of the war, and really explains the conflict from a Ukrainian perspective. We spoke amid news of a major prisoner swap between Ukraine and Russia, so I kick off asking him about the significance of prisoner exchanges and what it means, if anything, for the trajectory of the conflict. We also discuss the recent major missile barrage on Kyiv, which was the largest single attack since the start of the war, and Ukraine's response.  Much of our conversation focuses on some of the trends to follow in 2024, particularly as there is serious doubt about whether or not the United States Congress can pass a funding bill to support Ukraine's defense.