Since November 2009, when the Tribune first opened its doors, the blog 'Ads Infinitum' has tracked significant political advertisements from the primary and general elections. As it turns out, we've covered more Republican advertisements than Democratic. We created a treemap data visualization so readers could easily sort the advertisements by five different categories: candidate/organization, political party, election, promotional/attack, distribution. Confused? View a tutorial or read a related story. You can also view the ads and read transcripts by exploring this interactive feature.