Greg Jarboe, SEO-PR (www.seo-pr.com) interviews Dan Siroker, Co-Founder, Spreadly (http about his involvement in the 2008 Obama presidential campaign as Deputy New Media Director, Obama Presidential Transition. Siroker highlights some key lessons learned in how using analytics helped Obama win the presidency. These include defining quantifiable success metrics for your campaign. Siroker also describes an experiment done at SES Chicago about what key videos and messages were most effective …