at the same time , washington and ottawa are working with the mexican government to forge a north american energy and climate agreement that would move the three countries closer to a continental market .
transcanada also said wednesday it has launched a separate lawsuit in the u.s. government ’s decision to deny construction of the $ 8 - billion project exceeded his power under the u.s. constitution .
transcanada also said it expects to take a writedown of $ 2.5 - billion ( canadian ) to $ 2.9 - billion after tax in the fourth quarter related to the keystone xl permit denial .
in rejecting the proposal last november , obama called crude from alberta ’s oil sands “ dirtier ” but acknowledged that debate over the pipeline has played an “ overinflated role ” in his country ’s political discourse .
by nia williams and valerie volcovici calgary washington ( reuters ) - transcanada corp sued the u.s government on wednesday to reverse president barack obama 's rejection of the keystone xl pipeline , and also plans to seek $ 15 billion in damages from a trade tribunal .
defendants in the houston lawsuit are u.s. economy .
trancanada 's lawsuit in a federal court in houston , texas , called rejection of its permit to build the pipeline .
after years of delays , the obama is due to host prime minister justin trudeau at a state dinner in washington in march .
the calgary - based pipeline company says the united states has never before denied a cross - border oil pipeline from canada , and the rejection of the project designed to transport vast quantities of canadian oil sands and some bakken crude to gulf coast refineries “ was arbitrary and unjustified .