Y’all do realize that an IA-3 D “vote sink” doenst really do anything to make IA-1 or IA-2 much better for the GOP; it mostly just makes already red IA-4 redder. IA-3 is inevitably going to be a tossup following re districting at best for GOP, because of rules so this really ain’t anymore of a dummymander than a D leaning Des Moine based seat map.
Depends on if it goes east or not. But it's possible to put Iowa City and Des Moines in the same seat, and that would produce a CD that is around 55-56% Dem iirc.
That isn't really possible with IA's rules