I guess he went through with it. If it has any effect it will only stifle the ability to express oneself. You allow Twitter to be sued over what users post and you think they wouldn’t immediately take down many of Trump’s tweets, especially the ones about Scarborough. Honestly, I think Twitter should in response simply delete his account saying it’s too much of a liability for them now.
https://www.buzzfeednews.com/article/ryanhatesthis/trump-executive-order-section-230-twitter-fact-checking