Carol Davidsen, the Obama for America (OFA) former director of integration and media analytics, tweeted Facebook was “very candid” that it allowed the Democratic organisation to do certain things because it supported them politically.

“Facebook was surprised we were able to suck out the whole social graph, but they didn’t stop us once they realised that was what we were doing,” she wrote in a series of tweets.

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“They came to [the] office in the days following election recruiting [and] were very candid that they allowed us to do things they wouldn’t have allowed someone else to do because they were on our side.”