Since The Texas Tribune launched in November 2009, the Ads Infinitum blog has collected and posted political advertisements — more than 70 and counting — from candidates in both parties running for various offices during the primary and general election campaigns. We recently went back and collected data on each ad we've posted and created a treemap data visualization so readers can easily sort the ads across five different categories: candidate/organization, political party, election, promotional/attack and method of distribution.

Certain trends emerge in the treemap. For instance, we've posted more Republican advertisements than Democratic ones. Sorting the ads ...

Full Story