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The shock about coming to America after an absence of four months is how, in that time, respect for and confidence in President Obama has slumped. It wasn't good in March; now the effect of what one blogger has called his apparent "impotence" has taken hold. It is not clear what Mr Obama actually does. He isn't engaged with the economy; he certainly isn't engaged with foreign policy; he has abandoned hope of a climate change bill this year (and probably for ever); he has seen his health care bill into law, but America awaits news of how it will be implemented; he is under attack for a casual approach to illegal immigration, notably from the Mexican narco-state. He has only just girded himself to go campaigning for his party in the mid-term elections. Last Sunday was...