US President Donald Trump signs executive order designed to limit the legal protections that shield social media companies from liability for the content users post on their platforms

There is an implicit step where it seems like there's is an assumption that this action had some basis in being reasonable, and isn't just a tantrum from the worst president of all time.

Which means Twitter would be more responsible for user content, which makes it more likely to take down content in the future to protect itself from civil liability.

Making the improbable assumption that the removal of Section 230 protections actually worked, then my understanding is that it would be completely infeasible for Twitter to actually operate. Their choice would appear to be:

• Perform no moderation at all, and allow all content. This is not viable in modern society.
• Be responsible for all posted content, when it is posted, as though the company had posted it, in the way that a newspaper, for example, can be held liable for the content of its articles. It doesn't seem that taking down content after posting would protect them. They'd have to vet each post before releasing it. Any potential copyright infringement claimant, or defamation claimant, or any other person with a potential complaint, would now have a gold mine: they could just go after Twitter.

Section 230 was meant to deal with a series of US court rulings that put online forums in a ridiculous situation in the early 1990s. Essentially, CompuServe decided not to have any moderation, whereas Prodigy tried to have some basic content guidelines, and had moderators that removed offensive content. As a result, two court rulings held that CompuServe was not liable for content, even if it was inarguably defamatory, whereas Prodigy, in large part because they did basic things like banning expletives, were liable for everything every user wrote, including things like complex defamatory claims about an investment firm and an IPO.

Trump’s Executive Order Targets Social Media Liability Protections That Allow for His Dubious Posts

it's actually quite simple. Trump's order takes control of the powers of censorship away from social media companies, and puts it in his own government's hands.