Thanks to thedigitalcampaign.com for this graphic. So far, presidential candidates have spent seven times the amount of money spent in 2008 on digital ads. Online ad spending has doubled as a percentage of campaigns’ budgets over the same time period.

How’s that money being spent? Mostly on campaign emails, but also on display ads, sponsored search terms, audio and video ads. For those of us in the civic space, that means a lot of room for growth.