Columbia University’s “Knight Institute” is suing the Trump administration on behalf of seven individuals alleging the president “blocked” them from reading his Twitter feed. The lawsuit, filed with the United States District Court for the Southern District of New York, alleges that due to Mr. Trump’s usage of his personal Twitter account to engage with the public, his @realdonaldtrump Twitter account is a “public forum,” blocking citizens of access is “unconstitutional,” and his personal Twitter account should be treated as a public forum under federal law.