They raise funds where the $ is. Theoretically, a major city like Milwaukee would have enough deep pocket Dems to raise funds for Congressthings from other parts of the state.
Theoretically, yes. But, I think people are sitting on their cash, as well as their hands. A couple of weeks ago Biden had a high roller meeting over in Madison — a Dem stronghold. He addressed this group and told them that they were the “deadest” group that he had ever addressed in his life as a politician. That elicited a laugh, but that’s about it.