U.S. climate credibility on the line as Biden heads to COP26

President Joe Biden wants to show the U.N. climate conference in Scotland that the United States is back in the fight against global warming. But continued haggling in Congress over legislation to advance his climate goals threatens to undermine that message on the world stage.

Biden leaves for Europe on Thursday for a G20 meeting in Rome followed by a gathering of world leaders in Glasgow aimed at saving the planet from the devastation wreaked by rising temperatures.

Biden had hoped to showcase legislation designed to fulfill a U.S. pledge...