https://techcrunch.com/2021/01/08/trump-banned-from-twitter/

President Trump was permanently suspended from Twitter Friday. In the announcement, the company cited “the risk of further incitement of violence” and the president’s past transgressions on the platform.

“In the context of horrific events this week, we made it clear on Wednesday that additional violations of the Twitter Rules would potentially result in this very course of action,” Twitter wrote. “… We made it clear going back years that these accounts are not above our rules and cannot use Twitter to incite violence.”