A number of gathering clouds hang over the field of play, from political polarisation to declining football viewership to the business woes of big Super Bowl advertisers
► Subscribe to FT.com here:http://bit.ly/2GakujT
► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs
For more video content from the Financial Times, visit http://www.FT.com/video
Twitter https://twitter.com/ftvideo
Facebook https://www.facebook.com/financialtimes
