New York Times reporter Maggie Haberman and Washington Post columnist Jennifer Rubin launched into a Twitter feud on Friday stemming from the latter's failure to properly establish an "off the record" conversation, which lead to a scathing article by Politico that included comments she intended to keep private. 

Rubin made the intended "off the record" comments in an email responding to a request for comment on Politico's story concerning the White House's promotion of her pro-Biden columns. She, however, failed to establish an agreement with Politico that her comments would be off the record, a failure she was mocked for considering the practice being part of journalism basics. 

"For the uninitiated - and the initiated pretending they don't know because it's a fun way to slam a reporter - off the record is an agreement. Don't send an email saying OTR - especially when you're ostensibly in journalism! - and not wait for the reporter to agree," Haberman tweeted without mentioning Rubin by name. 

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"This is really basic stuff, and folks in the current White House - many of whom have long experience dealing with reporters - know this," she added. "People can take issue with the timing of a story or the subject of a story. But suggesting the reporter did something nefarious when the person didn't follow the way OTR works is wrong."

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Rubin responded to Haberman, refuting her statements and seeming to claim it was "low class" for Politico to publish her comments on a subject that "was not a newsworthy scoop." 

"I mean really, who behaves that way..." Rubin added. 

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Haberman sharply hit back, however, questioning why it was the Politico journalist's responsibility "to know how journalism works," rather than Rubin's. 

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"I don't think you understood. Re-read the tweet. Or not. Whatever..." Rubin responded again. Haberman, however, didn't reply. 

Rubin did receive seeming support from a left-wing ally: Neera Tanden, a Democratic operative and one of many officials to receive flattery from Rubin online.

"Just as a personal matter, there's a golden rule - don't talk to reporters who burn subjects who are off the record," Tanden tweeted.