https://motherboard.vice.com/en_us/article/j5kv58/trump-forced-to-unblock-on-twitter

Last month, a federal court judge ruled that President Donald Trump’s habit of blocking people on Twitter was unconstitutional. The ruling—part of a lawsuit filed by civil liberties group Knight First Amendment Institute at Columbia University against the president and his social media manager Daniel Scavino last year—determined that the @realDonaldTrump account is a “public forum,” and therefore his blocking people based on their political speech constitutes viewpoint discrimination that violates the First Amendment.

Tuesday, the Knight Institute announced that the seven individuals it represented in court were unblocked by the @realDonaldTrump account.