https://www.cnet.com/news/twitter-hunts-down-fake-accounts-to-help-safeguard-midterm-elections/

It's expanded its rules for identifying fake accounts, looking for stock or stolen avatar photos, stolen or copied profile bios and profiles containing misleading information -- with a particular focus on that profile's location.

Political candidates are getting a prompt to turn on two-factor authentication, but they aren't required to enable the security feature. A majority of candidates have been using two-factor authentication, a Twitter spokesman said.