(CNN) After announcing over the weekend that it would take the unusual step of opposing Brett Kavanaugh's nomination to the Supreme Court, the American Civil Liberties Union will launch a seven-figure ad blitz across four states urging senators to vote against his confirmation.

The spots will air in West Virginia, Alaska, Nebraska and Colorado, including one in the Denver area during what should be a highly-viewed Monday night NFL game between the hometown Broncos and Kansas City Chiefs.

In an interview, ACLU national political director Faiz Shakir said the total expenditure will come in at a little more than a million dollars, with a specific focus on persuading moderate and conservative women.

He also hopes the effort will broaden pressure on Republican senators beyond those currently viewed as swing votes.

"I don't think it should rest on Murkowski and Collins to be the conscience of the nation right now," Shakir said, suggesting the pair might be more likely to reject Kavanaugh in the end "if they feel like there's greater atmospherics and environmental pressure surrounding other senators."

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