Congressional District Ratings – which use Comscore’s advanced political and demographic data – will mean local TV sellers can gain higher ad revenue among political advertisers.

Comscore can deliver custom geography reports that are built from the ZIP code level up as well as using its TV measurement footprint of more than 30m households.

Steve Walsh, executive vice-president, national and local markets, Comscore, said: "Having detailed TV ratings information can be effective in reaching and influencing voting audiences, particularly in the dozens of highly contested battleground districts where the margin for error is razor thin. We're thrilled to be introducing a solution that meets a critical need in the political advertising arena."