Google has long offered specific geographic ad targeting, but this election season it's getting even more local by allowing users to target ads to specific congressional districts. Instead of generically hitting an entire zip code, the new feature will allow candidates and their supporters to serve ads to voters in districts that snake across multiple zip codes, as is often the case (for better or worse). Politico reports that the feature is already in use in some House races. In fact, Google has an entire "Four screens to victory" ad toolkit for advertisers, showing that it's well-aware of the record-breaking money that's going into politics this year.