Here's the problem with not having a coherent national response, and leaving it up to the individual states: There are not walls around every state that are impenetrable to viruses, and people freely travel from state to state to state. The virus doesn't care what state someone is in. The idea of "Well Oklahoma is doing fine, we should open up" is not realistic and doesn't take into account the country as a whole. We have flattened the curve, SO FAR, but if we stop what we are doing in the middle, the curve will go straight back up. We need robust testing and contact tracing, and not just of symptomatic people, of as many people as we can test, before we "open up" but that isn't going to happen and I fear many more people are going to die than necessary. Even South Korea, which most people agree has been the model for how to handle this pandemic, is having to close back down as cases are re-emerging.
This is a very interesting approach I found in my inbox this morning. I'm still mulling it over, but it proposes combined samples by household that can be tested with only one test per event.
https://www.forbes.com/sites/kotlikoff/2020/05/03/dr-fauci-heres-a-way-to-contain-covid-19-and-reopen-the-economy-in-as-little-as-one-month/#3367f72a1c7a