President Obama's Oval Office speech last night focused on the Gulf oil catastrophe, but its true purpose was impossible to miss: shoring up the president's tanking popularity. Some 57 days after the BP oil rig blew -- triggering an underwater oil gusher that's yet to be contained -- a majority of Americans, polls show, think Obama's been too detached from the crisis. Thus, the president is taking a new tack: huffing and puffing. "Tonight, I've returned from a trip to the Gulf Coast to speak with you about the battle we're waging against an oil spill that is assaulting our...