The 2013-2021 Relative Shift by legislative district is an imperfect but relatively decent way to measure the trends going on in NJ's various communities.
The inperfection comes in the noise, such as the two most hispanic districts having diferent relative shifts, with Patterson's LD 35 trending away from the Dems by -18.97%, much less than Demographically similar North Bergen Based LD 32 which trended away from the Dems by 1.55%.
Despite the aforementioned imperfections, from this map, we can actyally see the major trends that have occured in NJ throughout the 2000s. With the WWC south trending heavilly away from the Democrats, except the districts based in Co which trended significantly less so, or towards Dems
Furthermore, we can see that North Central Jersey, near Sommersett Morris & Hunterdon Counties trended significantly towards Dems from 2013-2021, slongside the Newark/South Bergen Area Trending away from Dems in the same Period.
Alongside this, we also find the trend Statich areas of Monmouth County and Central Bergen (LD-38), which while trended towards Dems, did so by less than 2%.