Co.Create points to a great piece of interactive journalism from PBS, which reveals how both the Romney and Obama campaigns are using digitally collected data (sometimes called "big data") to focus their mobilization and persuasion campaign efforts. There are interesting learnings here for brands as the political objectives of mobilization and persuasion have direct correlations to marketing campaigns.
PBS takes the story a step beyond the video (shown above) by developing an interactive element to their report. Targeting the Electorate allows users to "find out how [political] campaigns may be targeting [them]" by answering a few simple questions about themselves. The result (see mine below) is a custom report indicating how they are likely being targeting by the campaigns of the presidential candidates.