President Donald Trump can't block Twitter users critical of his policies from following him on the social network, a federal judge ruled Wednesday.

Seven Twitter users sued Trump in July after the president blocked them for criticizing or mocking him on the social network.

The group argued the practice violates the First Amendment.

US District Court Judge Naomi Reice Buchwald agreed with the seven, ruling that a public official may not block people from his or her Twitter account in response to the political views the people have expressed, even if that official is the president of the United States.

"We hold that portions of the @realDonaldTrump account -- the 'interactive space' where Twitter users may directly engage with the content of the President's tweets -- are properly analyzed under the 'public forum' doctrines set forth by the Supreme Court, that such space is a designated public forum, and that the blocking of the plaintiffs based on their political speech constitutes viewpoint discrimination that violates the First Amendment," the judge wrote in her ruling.

"In so holding, we reject the defendants' contentions that the First Amendment does not apply in this case and that the President's personal First Amendment interests supersede those of plaintiffs."

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