The last time the Republicans won a legislative majority in NJ...they were electing people like Christine Whitman. Whitman would make Susan Collins look like a hardcore conservative.
I don't really think it's possible to shift the party that far left from where it is now, especially during the Trump Era. A GOP Majority in either legislative chamber seems pretty far fetched.
It's certainly not possible in 2019. Diane Allen's seat is an auto-D gain. So that's 25. Then let's assume D's don't gain anymore seats than that in 2017 (unlikely, but for the sake of argument). Republicans could hypothetically win the 1st, 2nd, and 3rd districts in South Jersey, but that's incredibly unlikely. Sweeney is safe as long as Norcross retains any power. So is Van Drew. Where else does the GOP pick up any D-held seat? All the other D seats at that point are Hillary 60+% seats.
Yeah, and considering the political winds in that state, NJ Dems probably have nothing to fear
