https://www.theguardian.com/technology/2018/mar/24/tumblr-says-russia-used-it-for-fake-news-during-2016-election

Site unmasks 84 accounts used by 13 people linked to Russia’s ‘troll farm’, the Internet Research Agency, and says law enforcement has been notified

The blogging platform Tumblr has unmasked 84 accounts that it says were used by a shadowy Russian internet group to spread disinformation during the 2016 US election campaign.