I think it will not technically be a ban, but a de facto one.
Some variation on, "Open weight models must be A) trained in the USA B) have a public training dataset + training pipeline C) be reviewed by a government 'safety council', etc" Something which technically leaves a crack open for someone to release a less capable model than the commercial ones.
NVIDIA won't be too happy about that; alongside Micron, etc.
US commercial interest =/= OpenAI and Anthropic.
That kind of policy will hold a country back, and why I don't think it will happen. There are already many companies already using Chinese models.
Another confounding factor, if a US company fine-tunes a Chinese model, or vice versa, what is that country that should be assigned to that model.
You also have to consider the competition between the US and China. If the US did something like this, the world will move to Chinese hardware and Ai. The think tanks that talk with legislators understand this.
You have more faith than I do. It would be bad policy, but hardly a first for a government who wielded tariffs like a cudgel in spite of obvious repercussions.
honestly the surprising thing at this point would be if america did actually pass a policy of any sort, good or bad, vs just relying on the president to yolo some executive orders now and then that change every 2 years. Plus at least for the next couple years nvidia likes open source models and the president likes the ceo of nvidia. There could be a falling out but nvidia has deep pockets to ... discourage ... a falling out.
It's worth remembering that the tariff stuff is not any sort of durable policy. It's one guy sort of doing whatever until 9 other guys a year later go 'hey wait' and then the first guy does whatever again anyway. The whole thing is just a recipe for whiplash. maybe congress remembers that they're supposed to do stuff in a few months and steps in. maybe they don't and then every 4 years we have wild swings in enforced based on which half of a percent of the voters in georgia had rainy weather where they lived in early november. More of a simultaneous "All of the above and also none of the above" deal until the dynamics of american government fundamentally shift
There are people in Trump's inner most circle that know this. I'm not worried about it. People trust those calling for regulatory capture (Dario / Altman) the least. (HN is not a good representation of the general population and AI userbase)