Something like this will get rolled out, piece-meal, throughout the country. As has been the case since the beginning of this, a lack of federal guidance and leadership means every jurisdiction will have to get ahead of this as much as might still be possible.
Ask and you shall receive: The Trump admin just released a statement "urging" the elderly and at risk to stay home and not have gatherings with more than 10 people.
That wouldn't be entirely inappropriate to leave it up to states if the states weren't also clearly as incapable as the government has shown to be.
Edit: sorry for the confusion, I'm saying letting states decide on appropriate measures somewhat independently is not necessarily a bad idea when competent people are in charge. Each state will have unique circumstances which will require customized interventions. I hear Ohio has been handling this well.
