Falling behind the Joneses

The New Jersey legislature has just passed a $2 increase in their state's minimum wage -- the first increase in a decade. This will put NJ wages well above the minimum in PA, which may increase pressure on our side of the river to compete for workers.

Maybe somebody who knows more about NJ can explain to me the significance of the vote summary at the bottom of this piece, which shows the (few) votes against and abstentions to be along District lines. Are those regions that oppose this farther from competing states? Crankier? Under business pressure? Just curious...