I'm skeptical, as with basically all polls these days.
But if I were to take it as reflecting reality, why might this be? Murphy's handling of the pandemic? Of course we all saw how that worked out in Florida. Seniors were supposed to deliver the state to Biden for that reason. Remember?
What it might truly suggest though is that Murphy is fairly popular in ways that an incumbent New Jersey Governor hasn't been in awhile.
The last incumbent Governor was more popular at his re-election.
Sorry, I meant Democratic New Jersey Governor.