Republican presidential candidate Senator John McCain travelled to Oregon in mid-May to deliver the definitive climate change speech of his campaign. He spoke in Portland, at the U.S. headquarters of Vestas Wind Systems AS, a Danish company that markets wind turbines around the world. He started on a self-deprecating note. “Today is a kind of test run for this company,” he said. “They've got wind technicians here, wind studies and all these wind turbines. But there's no wind. So now I know why they asked me to come and give a speech.” It was perhaps his most perceptive statement of...