https://www.cnbc.com/2018/11/13/russian-trolls-reached-us-instagram-facebook-users-before-midterms.html

Among the Facebook and Instagram accounts that were linked to Russian trolls ahead of the U.S. midterm elections this month, one on Instagram had more than 600,000 U.S. followers, Facebook said in a blog post on Tuesday.

A Russian troll farm was tied to more than 100 Facebook and Instagram accounts before they were blocked on the eve of the elections, Facebook said.