If the voters of New Jersey are stupid enough to increase the Democratic legislative majority, they will pay a very serious price; both monetary and in their quality of life.
New Jersey had a decade of all-Republican government and is only mid-way through a comparable amount of time with the Democrats. Property taxes went up under both administrations, and I defy anyone to explain how a Republican Trenton is going to improve quality of life in New Jersey, which seems driven by traffic, high housing costs, and continued development in a state that is already the most densely populated in the country. They can't, because these problems don't have easy solutions.
Perhaps in another few years Republicans can count on a "throw the bums out" election that gives them a chance to feed at the trough without resolving any of these problems and piling up more debt than usual because of tax cuts without any changes in spending, but in the Bush era, New Jersey seems comfortable with the Democratic bums.