Fascinating. NJ-2, at R+1 was a prime target for Ds to flip in 2018. By conventional standards used by the parties, probably on their top 10 list. By my model, still a "flipper" but harder due to its comparatively low rates of college educ (32%). 
But ostensibly, a party switch by @VanDrewForNJ would be motivated by the thought that it would help his chances of staying in Congress. I'm not so sure about that. Not so sure at all. After all, the fundamentals there favor the party (D) not the person. Similar dynamic in CA 25
where Ds will find replacing @KatieHill4CA will be fairly easy-as the flip there was a product of the district demographics and national atmosphere (negative partisanship) & less about individual candidates.
