The president should spell out what he is ready to do if Putin strikes again.

Supporting and arming Ukraine, and accelerating the collapse of the Russian military, is the most realistic way to end the conflict.

If the Kremlin is taking its cues from Alexander Solzhenitsyn, Eastern Ukraine is only a first step to "rebuilding Russia."

Images from the past month showing scenes from Kharkiv, Vinnytsia, Kyiv, Donetsk, Mariupol, and more

An outdated view of warfare helps explain why the U.S. was slow to supply long-range missiles.

Interpreting the meaning of an election conceived in chaos

Indiscriminate violence reveals Putin’s powerlessness to overcome Ukrainian resistance.

The novel, the work of history, and the internet resource I am turning to now

Forecasting a conclusion to an unpredictable conflict

The newly released report details a sustained, months-long effort to pressure Ukraine—and the White House’s attempt to conceal it.