Post-gaette: A group of coal state senators including Pennsylvania’s Bob Casey Jr. and Arlen Specter have negotiated protections for the coal industry into a draft of climate change legislation. But both Mr. Specter and Mr. Casey are withholding full support of the chairman’s mark, released Friday by Sen. Barbara Boxer, D-Calif., because of concerns about how Pennsylvania would be affected by a transition away from fossil fuels. The bill would give coal plants advance payments to take …