Donald Trump pledged to end the conflict in Ukraine, but the war has proved tough to solve. Now, he says he'll sanction Russia.

Russia's point man for arms control cautioned Donald Trump's incoming administration against resuming nuclear testing, saying Moscow would keep its own options open.

even large new inflows of petro-profits will not fundamentally close the widening gap with major partners. For policymakers in the United States, the quandary is how to resist Russia’s ...