Interesting article on how researchers are developing tools to detect and neutralize bot nets and hybrid bot/human nets ("cyborgs" or "sock puppets") trying to manipulate the conversation around the 2020 race, and how those seeking to manipulate the campaign are responding.
https://www.washingtonpost.com/politics/2019/11/20/are-bots-manipulating-conversation-heres-whats-changed-since/
https://www.washingtonpost.com/politics/2019/11/20/are-bots-manipulating-conversation-heres-whats-changed-since/