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We joined 600 WhatsApp groups that support the Bharatiya Janata Party, the right-wing party that won the general election, to investigate these campaigns. We found evidence of 75 hashtag manipulation campaigns in the form of mobilization messages with lists of pre-written tweets. Building on this evidence, we estimate the campaigns' size, describe their organization and determine whether they succeeded in creating controlled social media narratives. Our findings show that the campaigns produced hundreds of nationwide Twitter trends throughout the election. Centrally controlled but voluntary in participation, this hybrid configuration of technologies and organizational strategies shows how profoundly online tools transform campaign politics. Trend alerts complicate the debates over the legitimate use of digital tools for political participation and may have provided a blueprint for participatory media manipulation by a party with popular support.<\/jats:p>","DOI":"10.1145\/3479523","type":"journal-article","created":{"date-parts":[[2021,10,19]],"date-time":"2021-10-19T02:32:07Z","timestamp":1634610727000},"page":"1-19","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":26,"title":["Trend Alert: A Cross-Platform Organization Manipulated Twitter Trends in the Indian General Election"],"prefix":"10.1145","volume":"5","author":[{"given":"Maurice","family":"Jakesch","sequence":"first","affiliation":[{"name":"Cornell University, Ithaca, NY, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kiran","family":"Garimella","sequence":"additional","affiliation":[{"name":"Massachusetts Institute of Technology, Cambridge, MA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dean","family":"Eckles","sequence":"additional","affiliation":[{"name":"Massachusetts Institute of Technology, Cambridge, MA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mor","family":"Naaman","sequence":"additional","affiliation":[{"name":"Cornell University, New York, NY, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2021,10,18]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.tele.2016.03.002"},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1177\/2053168019848554"},{"key":"e_1_2_1_3_1","volume-title":"Framing processes and social movements: An overview and assessment. 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Troops trolls and troublemakers: A global inventory of organized social media manipulation. (2017)."},{"key":"e_1_2_1_8_1","unstructured":"Samantha Bradshaw and Philip N Howard. 2019. The global disinformation order: 2019 global inventory of organised social media manipulation. Project on Computational Propaganda."},{"key":"e_1_2_1_9_1","volume-title":"The hybrid media system: Politics and power","author":"Chadwick Andrew","unstructured":"Andrew Chadwick. 2017. The hybrid media system: Politics and power. Oxford University Press."},{"key":"e_1_2_1_10_1","doi-asserted-by":"publisher","DOI":"10.1177\/1527476415573957"},{"key":"e_1_2_1_11_1","unstructured":"Anumeha Chaturvedi. 2017. 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