I quoted Thomas Sowell’s analysis of the Obama speech yesterday. A key point was this:Someone once said that a con man’s job is not to convince skeptics but to enable people to continue to believe what they already want to believe.Accordingly, Obama’s Philadelphia speech - a theatrical masterpiece - will probably reassure most Democrats and some other Obama supporters. They will undoubtedly say that we should now "move on," even though many Democrats have still not yet...