TransCanada sues over Keystone rejection; accuses Obama of exceeding his powers

HOUSTON (AP) — The Canadian company that proposed the Keystone XL oil pipeline filed a lawsuit over the U.S. government's rejection of the project and announced it plans to file a second legal challenge that will seek more than $15 billion in damages.
TransCanada filed a federal lawsuit Wednesday in Houston alleging President Barack Obama's decision in November to kill the pipeline exceeded his power under the U.S. Constitution.