Globe and Mail: Canada's purported offer to cut emissions as part of a deal to get President Barack Obama to approve the controversial Keystone XL pipeline has been denounced by a coalition of groups seeking to thwart the project. "We oppose any deal-making in return for the Keystone XL tar sands pipeline," the groups said in a letter to President Obama - who is expected to decide the project's fate early next year. "Our rationale is simple. Building Keystone XL will expand production in the tar sands, and that...