You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Why You'll See Negative Political Ads in the Olympics With So Many Viewers, Obama, Romney Won't Be Able to Pass Up 'Contrast' Spots By Elizabeth Wilner, Published on July 26, 2012 0 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.