Liberal organization "fact checking" another leftist organization. Giving the appearance of honesty, while actually it's just relying on another biased entity to disprove something with which they disagree.
It would be akin to CNN relying of MSNBC to disprove something that Rush said on the radio.
Thanks
“Follow the LOOP”
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Some prior discussion that this is Loop Capital.
Could it also be referencing the “OODA Loop?”