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President Donald Trump cannot block users on his Twitter feed, a federal judge in New York City ruled Wednesday.
Judge Naomi Reice Buchwald said in her ruling that Trump is violating the U.S. Constitution by preventing certain Americans from viewing his tweets.
The social media platform, Buchwald said, is a "designated public forum" from which Trump cannot exclude individual plaintiffs.
The judge's ruling was in response to a lawsuit filed last July by the Knight First Amendment Institute at Columbia University, as well as seven other plaintiffs who said they had been blocked on Twitter by Trump.
The plaintiffs included a journalist who had tweeted at Trump that "Russian won" the presidential election for him, a surgeon and a Texas police officer.
The blocks on the social media platform prevented the plaintiffs from viewing or responding to the president's tweets when logged into their own Twitter accounts. Trump is an avid Twitter user and routinely makes news, often several times in a single day, with his posts.
The president has more than 52.2 million Twitter followers and has tweeted more than 37,600 times since signing up for Twitter in March 2009.