It already happened several times. Twitter admitted to hiding tweets with hash tags like #wikileaks; #podestaemails... So I guess the USA isn't all that different, if you dismiss the propaganda. You just don't have the universal healthcare and you get to spend 10 times more on the military and NSA snooping.
They admitted to banning bots, which is what they did. If someone doesn't like the fact that bots inflated propaganda that they happened to believe in doesn't make it censorship.
