I'm not sure this is the correct place for your question as it deals with a hypothetical about the current USA. Maybe /r/AskReddit or /r/PoliticalDiscussion would be a good fit.

Alternatively you could try rephrasing and posting a separate question about the history of the imperial and metric systems in the US. That probably wouldn't answer your original question, but might be interesting.

Sorry, but I don't see a question about history here, so I have removed this post. u/Doe22 makes some good suggestions about alternate subs you could try posting this to, or how to rephrase the question so that it better fits AskHistorians mandate.