The government can come into my shop and order sixty thousand widgets built exactly the way they say they want them built, and it may be something that doesn't run afoul of any laws at all.
But that doesn't mean that I am required or compelled to build widgets their way -- or at all.
I'm free to tell them to fuck off.
The government can then find go someone else to build widgets to their specifications (or not; that's very distinctly not my problem).
The government signed a contract with Anthropic, then changed their minds and decided they don't like the terms of the agreement that they had already voluntarily signed, and then they designated Anthropic a supply chain risk.
It's like ordering a pizza to the Pentagon, and then saying "actually we made a mistake with our order; we want that pizza delivered to Venezuela, please do that". And then when Dominos politely says that's outside of their service area, you call them a threat to national security, say they're trying to dictate terms, and ban them from ever doing business with any of your vendors ever again.
Goverment is being super unreasonable here. And tyrannical too, companies dont have duty to provide unreliable arms for illegal war.