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“The Supreme Court decision is another important step as we advance towards building this vital energy infrastructure project,” TC Energy Chief Executive Officer Russ Girling said in a statement.

Keystone XL also faces added scrutiny amid the U.S. presidential election. Democrat Elizabeth Warren has said permits for the pipeline and the similarly controversial Dakota Access project should be revoked. It wouldn’t be the first time the project has been the target of a new U.S. president. President Donald Trump issued a memo on his fourth day in office inviting TC Energy to reapply for a presidential permit that had been rejected by President Barack Obama on environmental grounds.

“With so much scrutiny on the project coming from the left, we believe TC Energy must wait to sanction the pipeline until it knows whether or not President Trump can hold onto the White House,” said Katie Bays, an energy analyst and co-founder of Washington-based Sandhill Strategy LLC. “We don’t expect any near-term action given the enormous binary risk posed by the election outcome.”

The 1,200-mile (1,900-kilometre) pipeline would help carry 830,000 more barrels of crude a day from Alberta’s oil sands to U.S. Gulf Coast refineries, providing relief from the pipeline shortage that has hampered Canada’s oil industry. The project has been a top target of environmentalists, who argue that the pipeline would contribute to catastrophic climate change by allowing more production from the oil sands.

The win “was expected, but it’s still good news for the project in an age where wins aren’t as commonplace as they used to,” said Brandon Barnes, an analyst at Bloomberg Intelligence. Next will be an Oct. 9 hearing for the case in Montana, he said.

TC Energy shares fell less than half a per cent in early trading on a day when most energy stocks were down after China hit back at the U.S. with tariffs on US$75 billion of imports, including oil.

Bloomberg.com