- 2016 Campaigns Will Spend $4.4 Billion On TV Ads, But Why?: "...[T]here's evidence that the number of persuadable voters is shrinking, as the number of moderates slowly but steadily declines and voters grow more polarized." http://www.npr.org/sections/itsallpolitics/2015/08/19/432759311/2016-campaign-tv-ad-spending 16 comments politics