According to court documents, Trump admitted that he blocked the plaintiffs in the case in 2017 after they posted tweets that “criticized him or his policies.” Once they were blocked, they were no longer able to view Trump’s tweets while logged in, and no longer had access to reply to tweets or view comment threads on Trump’s Twitter page.
The First Amendment prohibits government discrimination against a person’s free speech based on their viewpoint. Trump claimed that his Twitter account is private, so the First Amendment should not apply.
The court said that Trump’s account was indeed private before he became president, but that changed once he took office and used it for official business, as it now displays “all the trappings of an official, state‐run account.” The court said that once Trump leaves office, his account will be considered private again. A federal appeals court ruled that President Trump is not allowed to block people on Twitter over statements he does not like, affirming a lower court’s decision that declared the president’s account a “public forum.”
In a decision, the 2nd Circuit Court of Appeals noted that because Trump uses Twitter to communicate with the public about his administration, and his account is open to the public for people to comment on his posts, it warrants constitutional free speech protection under the First Amendment.
“We do conclude,” the opinion said, “that the First Amendment does not permit a public official who utilizes a social media account for all manner of official purposes to exclude persons from an otherwise‐open online dialogue because they expressed views with which the official disagrees.”