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New York and New Jersey are neighbors, but they have not always treated each other in a neighborly way. Their proximity and pride have led to plenty of fights — over who can lay claim to Ellis Island (both actually), which state has the best pizza (still raging) and the proper way to get gasoline (solo vs. full service).

But the latest chapter in this rivalry might be among the nastiest.

New York recently approved congestion pricing, a plan to make it more expensive to drive into the heart of Manhattan. Officials in New Jersey are enraged and have griped, half-jokingly, that it will cost less to travel to California than to cross the Hudson River.

And they are vowing revenge.

The mayor of Jersey City suggested that New Jerseyans should toll New Yorkers entering their state. A congressman is calling for federal legislation to guarantee that drivers — who already pay tolls to cross between the states — are not charged twice. Others believe a lawsuit could be filed to stop the tolls.

“We are a little confounded about why suddenly New York would turn around and take a two-by-four to New Jersey,” said Representative Josh Gottheimer, a Democrat who represents a slice of New Jersey suburbs near Manhattan and plans to introduce a bill he hopes will pressure New York to give his state’s drivers a break.