Iowa and South Dakota rely mostly on wind and are amongst the states that have the cheapest electricity in the USA - https://web.stanford.edu/group/efmh/jacobson/Articles/Others/24-08-Letter-Vance.pdf
List of countries and states and their % of renewables: https://web.stanford.edu/group/efmh/jacobson/WWSBook/Countries100Pct.pdf
It’s certainly true it’s easier when you have hydro though.
Seems to be a recent thing, as I was looking at data from Feb 2023, and unrelated to Norway’s use of renewables.
Interesting article nonetheless.
They should definitely cone to a different pricing agreement with Norway as to not negatively affect them.
And it will be even less of a problem once those countries properly ramp up their installation of more renewables and storage.