TransCanada said it filed legal action against the United States for the rejection of the Keystone XL oil pipeline, arguing it was protecting its investments. Oil company TransCanada announced it filed plans to issue a claim under the North American Free Trade Agreement in response to a U.S. federal decision to deny its permit to build the cross-border section of the Keystone XL oil pipeline. A lawsuit was also filed in a federal court in Houston, arguing U.S. President Barack Obama overstepped his authority in his decision to deny construction of the pipeline. Standing beside Vice President Joe Biden and Secretary of State […]