The U.S. presidential campaign of 2016 and Donald Trump's victory contributed to a new comprehension of America's role in the world order. The U.S. - NATO relations were a major issue in those discussions. The article deals with the European response to Trump's success in view of his pre-election rhetoric about NATO as an obsolete alliance, estimates if his threats to cut support for those allies who do not contribute adequately to common defense, are realistic. Donald Trump, as the author argues, will stick to continuity in his relations with the NATO allies, having in mind that the key U.S.-led alliance must not be threatened. Simultaneously, the author dwells upon the flawed Russian stake on Trump's supposed anti-globalism and national capitalism. Under Trump all attempts to reduce tensions in U.S. - Russia and in NATO - Russia relations have turned unsuccessful so far. This is due to both domestic U.S. factors (primarily Trump's confrontation with his opponents over his "Russian ties"), and failure to address the basic causes of the current West - Russia tensions (Ukraine etc.). At the same time, the first months of the Trump administration demonstrated increased alienation of the European allies from Washington. The author argues that the crisis of Western domination under Trump should be used by Russia to promote its geopolitical and economic interests. Despite unabated Russia - U.S./NATO tensions, Moscow should use any opportunity to re-vitalize arms control and confidence building.