There was an interesting situation in New York. After the 2020 census, they lost a seat in Congress because their population size shrunk proportional to the rest of the country's. If New York had just avoided 2 or 3 of the larger nursing home COVID outbreaks, they'd have kept the seat.
Very roughly, there's a House seat per 750,000 people in the US. They were really close enough that a couple nursing home populations (in the hundreds) made the difference?