EDGARTOWN, Mass. — President Barack Obama wrapped up a 10-day vacation Saturday that was blissfully free of the news emergencies that have interrupted some of his past getaways. Grim economic reports cast an inescapable shadow over the first family's stay in Martha's Vineyard, and tough tasks on Iraq and the Middle East await the president in Washington after a stop in New Orleans Sunday on the fifth anniversary of Hurricane Katrina. But during his time on this lovely island, the president never once had to shed his leisure wear to step in front of the podium and address a national...