Eh political advertising has been obnoxious for years, not just this one. The “problem” is that NH is regularly competitive so outside groups produce ads and give money for ads. I used to live in a very blue area (80% Obama) and I assume the same is in very red areas: once you are past the primaries it’s not worth it for outsiders or national groups to spend much money on tv ads or flyers. There was so much less advertising (like I’d only get a 4 or 5 mailers per year). People trying to influence elections prioritize close races.