Yeah, this was a tough one. We've had intentional state-level underfunding of the line, and we could have federal underfunding of the fed NICS (staff) center, too. It's a tough call, but the feds could combine underfunding with a "coincidental" 3-day turnaround, legally, and effectively reimposing a waiting period. While the locals could do the same, at least we have some direct ability to fix that. NH politics are small and local - a Chicago alderman has about the same number of constituents as a NH state senator.
My gut is he'll sign it. The majority of NH 2A folks felt this was worth doing. The pull the other way was for admirable reasons (I say, since I was one of those who felt we should hold off for now), and it wasn't a tiny minority of 2A folks, and included some of those who got us con carry. But in the end he'll side with that majority. What else would he do? Make a veto stink over something slightly more than half his 2A supporters want?