Barack Obama’s trip to Europe and the Middle East did what it was supposed to. It untapped a stream of presidential images: the candidate addressing 200,000 delighted Berliners; the candidate mingling comfortably with American soldiers, riding in military helicopters like a commander-in-chief; the candidate dealing with foreign leaders as an equal. For most voters, it is the images that will stick – what else was there? – and they are priceless. John McCain’s chief line of attack against Mr Obama, that he lacks experience especially in foreign affairs, has been blunted if not neutralised.

Poor Mr McCain had the worst week of his campaign. Unable to lie low and let Mr Obama have his European moment, the only wise course, he made matters worse. He ran a television spot that said “blame Obama for the high price of gas”, a patently ludicrous assertion. (Republicans were laughing at their own candidate.) Campaign officials said he might announce his vice-presidential choice – a sad and unsuccessful attempt to steal some of Mr Obama’s limelight. And having spent months goading Mr Obama for his lack of foreign affairs experience, Mr McCain portrayed his own schedule of dreary and sparsely attended small-town events as proof of his superior authenticity.