Via various speakers in different forums, administration officials are repeating their message of the day: The successful killing of Osama bin Laden shows how America can succeed when it unites and perseveres through difficult trials. The spin is true, but is also very compatible with the needs of President Obama, who is facing a stalled economy, high unemployment, incipient inflation, declining poll ratings, a GOP-controlled House, and expanding public worry that the nation is on the wrong track. “Today, we are reminded that, as a nation, there’s nothing we can’t do —- when we put our shoulders to the wheel,...