Story highlights National Nurses United For Patient Protection is a super PAC that has spent at least $569,000 backing Bernie Sanders

Sanders is by far the most outspoken anti-super PAC candidate running for president

(CNN) Bernie Sanders declined to disavow a super PAC spending money on his behalf in an interview with CNN on Monday and contradicted a statement his campaign made about the political entities he has long spoken out against.

Sanders drew a distinction between National Nurses United For Patient Protection, a super PAC that has spent at least $569,000 backing him, and those super PACs backing other candidates during an interview with CNN's Brooke Baldwin.

"What I have said over and over again is that I have not and will not raise a nickel for a super PAC," Sanders said. "I am the only Democratic candidate who does not have a super PAC. I will not have a super PAC. They are nurses and they are fighting for the health care of their people. They are doing what they think is appropriate. I do not have a super PAC."

Sanders is correct that he has not raised money for the nurses super PAC, which is affiliated with National Nurses United, the first national union that backed his campaign. But in past statements, Sanders and his campaign aides have gone farther than saying the Vermont senator simply would not raise money or coordinate for a PAC. They have also said he would not take a super PACs help.

"We stand by our position that we do not want the help of a super PAC," Jeff Weaver, Sanders' campaign manager, said earlier this month after CNN wrote a story on the union super PAC supporting Sanders.

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