Before becoming president, Twitter was one of the most important tools for his political campaign; and at the end of his term of office, it remains a fundamental tool.
The controversies he has had on Twitter have generated controversy and some immunity, as Twitter has decided not to block the accounts of the leaders. However, the social network committed itself to eliminating tweets that might be offensive or to include additional information in tweets.
And so he did in Trump's case. The president wrote on the network that the vote by post was a farce, that it was not effective, and that the result was negative. The social network, aware that it could condition people's vote, inserted information about the mail vote under Trump's tweet. This provoked the anger of the president, who accused the social network of "trampling freedom of expression" and "influencing the next elections".
In this regard, section 230 of Communications Decency Act, which does not punish internet platforms for their users' statements, has imposed an executive order to override this "immunity". Some have denounced that this measure runs counter to the US Constitution, as the first amendment prevents the government from reducing freedom of the press or expression.