I don’t understand this one. The bill was introduced by some far left Democrats, and seems to have gone no farther than being assigned to committee. No hearings, no passage. Why would that open the door for censorship by social media?
A version of it passed as part of Defense Authorization 2017 (search for "disinformation").
-- Why would that open the door for censorship by social media? --
I don't see that link either. As far as I can tell, social media, like the press, if free to propagandize freely, including restricing public participation to opinions it shares, or at most, some "authorized dissent" so as to create an illusion of being fair and open.
This bill orders and authorizes the government to propagandize abroad, and to study propaganda.