Paul Saunders With U.S.-Russian confrontation over Ukraine at high pitch, and a summit between the Russian and Chinese leaders looming this weekend at the Beijing Olympics, many wonder how China might respond to the rising military tensions between Washington and Moscow. Indeed, as America’s competition with these two major powers expands simultaneously, the Russia-China relationship matters for the United States to an extent not seen for decades. Understanding its scope and limits is therefore critical to U.S. policymakers. In Russia’s standoff with the West over European security, Chinese diplomatic rhetoric has been “firmly in Russia’s corner,” as The Washington Post...