However, the Trump administration’s new national security strategy will put questions about US alliance commitments to rest, at least for the foreseeable ­future. Trump is not likely to refrain from berating allies now and then, but the new security strategy firmly ­embraces what has been a mainstream approach to US alliances. The strategy openly declares a new era of competition, in which China is called out as a revisionist, rival power. America’s new security strategy merely spells out what has been a leading feature of China’s rise: that it is not as peaceful as Beijing wanted the rest of the world to believe. The US security strategy also ­declares in no uncertain terms that Beijing will not dictate US policy on Taiwan.