To get 6 districts' worth of D+7 territory, you'll need to find a way to create 2 GOP sinks that are at least R+20. That's not something you can do in DRA alone.
I've always said that WI is one of the most ruthless gerrymanders in the country - and one of the hardest to break (outside of a true wave or massive Midwest resurgence) - but the state's population distribution definitely plays a huge role in why it's so easy to gerrymander.
Fun fact: Both WI-07 and WI-08, under current borders, voted for Obama by a larger margin than his margin nationwide in 2008.
