“Pennsylvania will not set up its own health care exchange under the federal Affordable Care Act, at least not for now, Gov. Tom Corbett said Wednesday, putting the state on a course to join others led by Republicans that will let President Barack Obama’s administration run its exchange. Setting up a state-based exchange would be irresponsible, Corbett said, as he faulted federal authorities for what he called inadequate answers to his questions about cost and other issues.”