America's allies are nervous. With Rus-sia grabbing territory, China bullying its neighbours and Syria murdering its people, many are asking: where is Globocop? Under what circumstances will America act to deter troublemakers? What, ultimately, would America fight for? The answer to this question matters. Rogue states will behave more roguishly if they doubt America's will to stop them. As a former head of Saudi intelligence recently said of Vladimir Putin's land grab in Ukraine: "While the wolf is eating the sheep, there is no shepherd to come to the rescue." Small wonder that Barack Obama was asked, at every stop during his just-completed four-country swing through Asia, how exactly he plans to wield American power. How would the president respond if China sought to expand its maritime borders by force? How might he curb North Korea's nuclear provocations? At every press conference he was also quizzed about Ukraine, for world news follows an American president everywhere.
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