Opposing one purchaser does not imply supporting another purchaser. I don't know the details of this specific transaction, but I would guess the Chinese buyer does not have the same market power that Amazon does, so isn't running afoul of antitrust law. It's also possible Warren is opposed to this purchase, too, but no longer has the influence to stop it.

It's not US government's job to help bad business leaders, they should do a better job of running their companies than using them as a slush fund.

This company would have probably flourished if it had workplace democracy but instead it was a centrally planned dictatorship and failed.

Maybe that is the real lesson here.