New England and a few big metros that straddle the boarder are issues, but even there the states involved could manage it together.

I think the New England states could manage this together fine.

I agree, the constitution grants the authority to the federal government to. But more and more, I think we should just let the states deal with as much as possible. It seems pretty clear we are far from a national consensus on many basic issues, and the constant winner take all grab for power is making things worse.