NH allows same day registration. Neither Sununu nor the legislature has ever thought to change that.
All you have to do, apparently, is attest to the folks at the polling location that you just moved to NH. So, for years folks from NY, Mass, Vt, and elsewhere have trekked up to NH to make sure Hassan gets in.
Simple solution to a simple problem.
List of folks that registered on the same day. Go by the address and confirm they are there and where they might work. If address is bad, do a search and find out where they live. You find out that they live in an adjacent state, get a warrant lock them up. Easy Peasy.
Folks like Sununu are nothing but clones of McConnell. They don’t care as none of it effects them.
That is incorrect. The legislature passed a law demanding 30-day registration before voting after the 2016 election. A federal judge overturned it as it was too inconvenient.