Isn't Wisconsin a Blue State?
Vermont is a blue state, but they have some of the best gun laws (or gun nonlaws) in the nation.
I see the divide in gun ownership not along red-blue lines, but along city-rural lines. Metropolitan areas will have stringent (and often unconstitutional) gun laws, while rural areas will have fewer laws.
In 2000 Gore won Wisconsin by about five thousand votes out of more than two million cast. In 2004 Kerry won Wisconsin by about ten thousand out of close to three million cast. In both elections widespread voter fraud which benefited Dems was discovered. Outside of Milwaukee and Madison the state is heavily Republican. But in Wisconsin even Dems have a lot of guns.