Last May, Trump announced in a speech in North Dakota he would approve the Keystone XL pipeline, but would seek percentage from the profits.
The proposed 1,179-mile Keystone XL pipeline would link the oil sands region in the Canadian province of Alberta to the US state of Nebraska, and all the way to the oil refineries on the Gulf of Mexico coast.
Last February, President Barack Obama vetoed a bill to allow the construction of the pipeline.
The Dakota Access Pipeline is intended to transport domestically produced light crude oil from North Dakota through the states of South Dakota and Iowa into Illinois. Last month, the US Army Corps of Engineers decided to halt final-stage construction of the pipeline because of environmental concerns.
The project has sparked protests with violent clashes involving local law enforcement officials, who have used dogs, water cannons, tear gas and physical violence in unsuccessful attempts to end the standoff.
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