A group of First Amendment lawyers sent President Donald Trump a letter on Tuesday asking him to un-block Twitter users he shunned after they disagreed with him, NBC News reported.
The Knight First Amendment Institute, a non-profit representing several Twitter users blocked by @realDonaldTrump, argues that Trump's Twitter space is a "public forum," adding that "the viewpoint-based blocking of our clients is unconstitutional."
The White House did not immediately comment on the letter.
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The Institute's efforts come after press secretary Sean Spicer confirmed Monday that the president's tweets should be taken as official statements, which legal experts say bolsters the lawyers' arguments.