Or non-wealthy Americans interested in winding down Federal over-reach. Really, in a federal republic aren't there quite a lot of things which can safely be left to the several states? Is it necessary to make everything an item for federal concern?
I completely agree! Most of them are already explicitly listed as federal concerns, in the Constitution; we should amend it to include environmental concerns for the exact reason you note.
But I see no reason why e.g. education should be a federal concern. Let the states do as they will.
Well, you hope so, otherwise a federal republic is a good idea. OTOH, simply because you have a federal government (or even that it was a good idea a century or two ago) doesn't mean that a federal republic is a good idea, and even if a federal republic is a good idea and there are quite a lot of things that make most sense at the state level, well, that doesn't mean that every particular thing belongs there.
Taking my own advice, regardless of what you or anybody may think of the connection between Russian money, Russian politics, and Mr. Trump, surely we can find a number of wealthy Americans who are interested in winding down Federal oversight.
I'd start with the high-fructose corn syrup people, the private university rip-off people, and the fossil fuel people. If there are also Russian interests, surely they are not "acting alone."