Former GOP Rep. Ryan Costello (Pa.) is signing on to work for a group pushing a business-backed proposal to fight climate change with a carbon tax. Costello, less than a week out of the House, announced Monday in a Wall Street Journal opinion piece that he’s the new managing director of Americans for Carbon Dividends. The group is the advocacy affiliate of the Climate Leadership Council, pushing a plan by former GOP Secretaries of State James Baker and George Shultz to tax carbon dioxide emissions and return the money to individuals and families on a quarterly basis. “I understand the...