A federal judge on Wednesday allowed a lawsuit over a key permit for the Keystone XL oil pipeline to move forward.

U.S. District Judge Brian Morris rejected a request from the Trump administration and developers of the Keystone XL pipeline to throw out the lawsuit.

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The Indigenous Environmental Network, North Coast River Alliance and others challenged the presidential permit issued by the Trump administration in March allowing the pipeline to cross the U.S.-Canada border.

The permit was issued using older environmental assessments that opponents say need to be updated before a cross-border permit can be issued.

The Trump administration and developer TransCanada argued the lawsuit should be dismissed due to jurisdictional concerns. Morris, an appointee of former President Barack Obama Barack Hussein ObamaTwitter investigating automated image previews over apparent algorithmic bias Donald Trump delivers promise for less interventions in foreign policy Rush Limbaugh encourages Senate to skip hearings for Trump's SCOTUS nominee MORE, rejected that request on Wednesday.

Opponents of Keystone XL celebrated the decision Wednesday. Their lawsuit against the federal permit is one of the key roadblocks still facing the Keystone pipeline.

A Nebraska regulatory commission this week issued a permit allowing the construction of the pipeline in the state. That decision is subject to legal challenges, and TransCanada is analyzing the economics of building the proposed $8 billion pipeline before moving forward.