A who's who of top popular musicians will take to the stage in Pittsburgh and cities in eight other presidential battleground states beginning the first week of October. Their goal? "We're trying to put forward a group of progressive ideals and change the administration in the White House," said Bruce Springsteen, one of the acts. Ah, yes, "progressive ideals." For those of you not up on the latest liberal nomenclature, that's the new phraseology of choice for contemporary enlightened thinkers advocating that tried and failed political philosophy previously known as socialism. Organizers of the "Vote for a Change" tour are...