During the 2008 campaign Barack Obama ran more against lame-duck President Bush than against his Republican opponent, John McCain. The campaign is now long over, and yet President Obama still seems haunted by the ghost of his predecessor. Last week, for example, he was railing at the Bush phantom, whom he blamed for his received economic mess. In the world of Barack Obama everything he inherited was someone else’s fault — unless he believes past policies offer him some advantage and thus are to be claimed as entirely his own. The stock market is sliding. Gas and food prices are...