Recent steps by the Kremlin not only undermine regional security in Europe, but they also put transatlantic unity under the test. Partly this is a result of the overall degrading of international institutions in times of crisis, but also it is an effect of Russia’s deliberate efforts to smantle key transatlantic institutions. Moscow’s revisionist policy is challenging foundations of the world order, in which long-term partnership between he US and Europe has always been a key element. Whether American and European strategic interests will still be overlapping is a focus of this article.