National Journal: Most environmentalists say construction of the Keystone XL pipeline would be "game over" for the climate, but former New York City Mayor Michael Bloomberg says there's an upside--if President Obama can trade it for a climate deal with Canada.
Bloomberg, in his first official statement on the pipeline, wrote an op-ed suggesting that the contentious oil-sands pipeline can be a major chip in talks with Canada. Used correctly, he said, the pipeline can even result in a deal along the lines of the...