A group of Republican senior statesmen are 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 The group will meet Wednesday with White House officials, including Vice President Mike Pence, senior adviser Jared Kushner, and Gary Cohn, director of the National Economic Council. Also supporting Baker's effort are Hank Paulson, treasury secretary for former President George W. Bush; Greg Mankiw, who chaired Bush's Council of Economic Advisers; and...