That is actually constitutional. The President has authority over international agreements like Keystone which crosses an international border.
The Keystone pipeline already exist in the United States. Evidently a treaty with Canada for same already exist. So where does Obama get the authority to hold up the final phase of the pipeline?
According to my copy of the Constitution….. “the President shall have the power by and with the advise and consent of the Senate to make Treaties provided that two thirds of the Senators present concur…..”(Article 2, Section 2, United States Constitution)
Does Obama have the advise and consent of two thirds of the Senators present to hold up the final phase of the Keystone pipeline?
The Keystone Pipeline System is an oil pipeline system in Canada and the United States. It runs from the Western Canadian Sedimentary Basin in Alberta, Canada, to refineries in the United States in Steele City, Nebraska, Wood River and Patoka, Illinois, and in the Gulf Coast of Texas.[notes 1][2] In addition to the synthetic crude oil (syncrude) and diluted bitumen (dilbit) from the oil sands of Canada, it carries also light crude oil from from the Williston Basin (Bakken) region in Montana and North Dakota.[2]
Three phases of the project are in operation and the fourth is awaiting U.S. government approval. Upon completion, the Keystone Pipeline System would consist of the completed 2,151-mile (3,462 km) Keystone Pipeline (Phases I and II), Keystone Gulf Coast Expansion (Phase III) and the proposed Keystone XL Pipeline Project (Phase IV). Phase 1, delivering oil from Hardisty, Alberta, to Steele City, Wood River, and Patoka, was completed in the summer of 2010. Phase 2, the Keystone-Cushing extension, was completed in February 2011 with the pipeline from Steele City to storage and distribution facilities at Cushing, Oklahoma.[3] These two phases have the capacity to deliver up to 590,000 barrels per day (94,000 m3/d) of oil into the Mid-West refineries.[3] Phase III, the Gulf Coast Extension, which was opened in January 2014, would have capacity up to 700,000 barrels per day (110,000 m3/d).[4] The proposed controversial Phase IV, the Keystone XL Pipeline Project, would begin in Hardisty, Alberta, and extend to Steele City
http://en.wikipedia.org/wiki/Keystone_Pipeline