Wall Street Journal: A far-reaching plan to fight climate change detailed by President Barack Obama on Tuesday would profoundly reshape the way the U.S. produces and consumes electricity, though the resistance it is sure to encounter promises to sow uncertainty for an industry already buffeted by shifting rules and economics. As part of a much-anticipated speech at Georgetown University, in which the president laid out the first-ever federal effort to rein in greenhouse-gas emissions from the power sector, Mr. Obama...