According to the Official AdSense Blog, they will very soon improve the speed of the AdSense Ad filter and at the same time enhance the blocking abilities of the Ad Review Center.

We also received questions about why political ads are able to run on Google and AdSense sites. The Google advertising program is managed by a set of editorial policies that we have developed based on various factors, including user and customer experience. While Google or its executives and employees may express opinions about specific political issues and candidates, Google's advertising system does not favor one political position over another. Our network provides advertisers with a way to reach their audience, whether they are companies selling products or political campaigns promoting candidates or issues. Just as Google's advertising system does not favor one car manufacturer's ads over a competitor's in our auction, we also allow ads regardless of the particular political position they represent.

We'll also continue improving the Ad Review Center, giving you ways to block entire categories of ads in addition to individual ads -AdSense

These changes are expected to be implemented over the next couple weeks.

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