Yes, the president does block critics on Twitter. That's what the latest legal filing related to President Trump's Twitter activities has revealed. If you'll recall, seven individuals filed a lawsuit claiming Trump is violating the First Amendment by barring their access to his account. Now, the Knight First Amendment Institute, a Columbia University group helping the plaintiffs, has announced that both sides have filed a formal legal acknowledgement in which they agree upon a set of facts. In that filing, the White House said it will not contest the plaintiffs' claims.