It is a sad irony that John McCain died within just a few days of President Trump overturning Clean Power Plan regulations to limit greenhouse gas emissions from power plants.  For McCain was the prominent Republican who cared most about climate change, and tried hardest to pass legislation to address it.  And he knew that while climate regulations were sometimes necessary stop gap measures, climate change would ultimately require legislation putting a price on carbon emissions and unleashing the power of markets and the private sector to create a low-cost, zero emissions economy.

As it stands, after only 18 months in office, the Trump Administration has now made proposals to…