When was the last time Morris County had a Democratic legislator? I think Helen Meyner in the 70s covered western NJ, but not this part of the state. Tilt D at best.
Morris County isn't the same White Anglo Saxon county it was 40 or 50 years ago. Aside from the large number of new residents who are Jewish/Catholic etc, New Jersey's large South Asian and Latino population are moving to places like Morris, at least the ones that are wealthy.
The economic character may not be too different, but you now have a decent chunk of the population who don't see the GOP as a party that represents them in any real way.