Every president needs to escape what former President Harry Truman called the "great white jail" and what former President Andrew Jackson referred to as "dignified slavery." But for President Obama and some of his more recent predecessors, getting out of the White House has come at a cost. The on-going BP oil spill and unemployment numbers that are still at 9.5%, have made Obama and his vacations a target. The crisis in the Gulf has dogged Mr. Obama during two long weekend trips away from Washington - one to Asheville, N.C., and another back to his Chicago home for Memorial...