How you characterize the behavior, Mafia or not, is of course your opinion, and I am sure if you are a voter/stakeholder you'd consider that in your political activity, but I'd appreciate if you clarify what you mean but your story and timeline, so I ask again, are you suggesting the US government has breached the contract they already signed?
I don't know why you keep bringing up breach of contract, it is not relevant to this discussion at all. No, the government did not breach the contract AFAIK, they just decided they didn't like it anymore, and instead of either withdrawing or entering into a negotiation about it, they decided to use threats to try and get their terms at metaphorical gunpoint.
The actual terms of the contract aren't even relevant, this is purely a matter of tort law and whether you can bully someone into a new contact because you woke up one day and decided you didn't like the one you agreed to.
It's actually even worse than that: Anthropic already agrees that the Pentagon can walk away from the contract and stop using Claude if they want to, there's no dispute there. What the Pentagon wants is to force Anthropic into a new set of terms which cannot be refused.