A group of Republican senior statesmen is pushing for a carbon tax to combat the effects of climate change, and hoping to sell their plan to the White House. Former Secretary of State Jim Baker is leading the effort, which also includes former Secretary of State George Shultz. In an opinion piece published Tuesday night in The Wall Street Journal, they argued “there is mounting evidence of problems with the atmosphere that are growing too compelling to ignore.” […] Carbon taxes are designed to raise the cost of fossil fuels to bring down consumption. Baker and Shultz detailed in the...