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We analyzed the Russian Internet Research Agency’s (IRA) 2015–2017 English-language information operation on Twitter to understand the special role that engagement with outsiders (i.e., non-IRA affiliated accounts) played in their campaign. By analyzing the timing and type of engagement of IRA accounts with non-IRA affiliated accounts, and the characteristics of the latter, we identified a
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Linvill et al. (2020) studied this question.