Environmental group the Sierra Club is set to launch a digital ad urging senators to oppose President Trump's Supreme Court nominee Neil Gorsuch.

The digital ad buy will be in a five-figure range, and will run in Indiana, Maine, and Colorado — the home states of three undecided Democrats.

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The ad will focus on the GOP's threats to invoke the so-called "nuclear option" and let Supreme Court nominees be confirmed by a simple majority vote.



The nominees currently need to pass a 60-vote threshold to end debate and move to a final vote. Senate Republican leaders have said they will turn to the nuclear option if they can't get 60 votes for Gorsuch.

"Change the nominee. Not the rules. A Supreme Court justice needs 60 votes," the Sierra Club ad reads.

Courtney Hight, Director of Sierra Club's Democracy program, said Gorsuch's ideology threatens "both bedrock environmental laws and the rights of American citizens to a fair and equal voice in our democracy."

"That's why the Sierra Club is calling for Senators to oppose Gorsuch's nomination and to ensure that the Senate follows decades of precent and requires that he receive 60 votes to be confirmed."

If eight Democrats join the GOP in supporting cloture for Gorsuch's nomination, it would reach the 60-vote threshold to allow a vote. So far, two Democrats have said they will back Gorsuch, while 38 have said they won't. Bennet, Donnelly and King are among the eight remaining Democrats who have not publicly said which way they're voting.