Those of us who support globalisation, who celebrate the way it has raised living standards and reduced poverty around the world, are forever worrying that there may soon be a backlash, a revival of protectionism and economic nationalism. We mutter angrily whenever politicians make nationalist noises. With Barack Obama emerging victorious as the Democratic candidate for America's November election, the muttering is going to resume - for against all his virtues, one of his vices is that he has been talking tough about trade. But on current evidence the muttering will be misplaced. The surprise is how nice he has...