There is no way Trump will ever get a majority in New York or New Jersey. Both states have Ben Democrat run for as long as I can remember. Chris Christie was the first and only Republican governor in recent memory.
One strong reason New Jersey is such a blue state, the Teachers Union (my aunt has headed one chapter for decades) throws a lot of weight around.
There is also a correlation between Democrat run states and the high number of COVID cases and lockdowns.
By contrast, a red state like South Dakota,, never locked down and never had a spike in cases.