Four cities:
Camden
Trenton
Newark
Atlantic city
There’s no way NJ will EVER vote Republican. These welfare cities make up NJ voters blocks that just won’t be overcome by the smaller townships.
The six towns of Toms River, Hamilton, Gloucester, Middletown, Brick and Old Bridge have about the same population.
The real problem for the GOP in NJ is not the 15% black population.
It is the large number of liberals in the 75% of the population that is white.
That white population is almost evenly split between socially conservative/fiscally quasi-liberal Catholics and socially quasi-liberal/fiscally conservative Protestants.
There is a reason why almost every successful NJ Republican is a pro-abort - that stance cements the country-club mainline Protestant base of the NJ GOP.