Ummm… yes it is when the speech is being suppressed by the government?
That’s kinda the entire point of the 1st amendment.
The courts have ruled that the government asking a private party to censor is no different than the government censoring itself.
Nothing says they can't contact papers.
The government routinely speaks to news papers about the government opinion on articles and how they are wrong. That's not censorship. Holding a figurative pistol to someones head and say "change this line" is censoring and supressing free speech.
The Twitter Files already has a statement from a Congressperson that Twitter's actions with the Hunter laptop will "result in a blood bath" during Congressional hearings.
If the 800 lb gorilla that is the US government is threatening a "blood bath", do you really have a choice when they ask for your "cooperation"?