President Donald Trump has been sued by seven people for blocking them on Twitter.
Trump is an avid user of the social media forum, which he deploys to praise allies and smash critics.
The lawsuit was filed by the Knight First Amendment Institute, a free speech group at Columbia University.
The seven Twitter users involved claim their accounts were blocked by the president, or his aides, after they replied to his tweets with mocking or critical comments.
People on Twitter are unable to see or respond to tweets from accounts that block them.
The legal complaint argues that by blocking these individuals, Trump has barred them from joining the online conversation.
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