His ominous warnings, at the end of a two-day trip to North Korea and Vietnam, placed Russia and the West in a new round of escalation over Ukraine. They come amid distraction and political uncertainty among Kyiv’s chief backers, with potentially game-changing elections on the horizon in the United States and France.

Beyond using nuclear weapons or causing more destruction on the battlefield in Ukraine, the Russian leader is seeking to prove he can pressure and antagonize the West in other ways and other places.