Far from Ukraine and the Gaza Strip, as the Group of 7 wealthy democracies gathers in Italy to discuss a range of old, entrenched challenges, the nature of American power is being transformed across the region that Washington sees as crucial for the century to come: the Asia-Pacific. Here, the United States no longer presents itself as the confident guarantor of security, a trust-us-we’ve-got-this superpower. The terrain is too vast, China’s rise too great a threat. So the United States has been