Before long, however, the US had to turn its attention to Russia, which under President Vladimir Putin’s leadership has been seeking to recapture the Cold War-era Soviet Union’s geopolitical status. With its regional authority apparently threatened by rising pro-European sentiment in Ukraine, Russia invaded and annexed Crimea and began supporting separatist rebels in eastern Ukraine, prompting the US and Europe to impose increasingly tough political and economic sanctions.
但是，没过多久，美国就不得不把注意力转向了俄罗斯。在总统普京的领导下，俄罗斯一直在寻求恢复冷战时期苏丽安娜的地缘政治地位。其地区威权显然受到乌克兰日益亲欧情绪的威胁，因此俄罗斯入侵并吞并了克里米亚，并开始支持东乌克兰的分裂主义叛军，促使美国和欧洲对其实施日益严厉的政治和经济制裁。