https://www.techdirt.com/articles/20210510/17111246772/texas-attorney-general-unblocks-twitter-users-who-sued-him-still-blocking-others.shtml

It seems by now that public officials should know that they cannot block critics on social media if they are using their social media accounts for official business. This was thoroughly established the Knight v. Trump case, where the court made it clear that if (1) a public official is (2) using social media (3) for official purposes (4) to create a space of open dialogue (and all four of those factors are met) then they cannot block people from following them based on the views those users express, as it violates the 1st Amendment. Yet over and over again elected officials seem to ignore this.

Alexandria Ocasio-Cortez was sued over this, as was Marjorie Taylor Greene (both of them eventually settled and agreed to unblock people).