MICHAEL KIMMAGE is Professor of History at the Catholic University of America. He is the author of Collisions: The Origins of the War in Ukraine and the New Global Instability.

The President had a decade-long bromance with his Russian counterpart and is thankfully changing tack, writes Michael McFaul.

Kagarlitsky’s case drew international attention. Kushnir was almost unknown, like thousands of other activists, artists, ...