Economic nationalism key to Donald Trump's appeal as gulf widens between America's rich and poor

The passing of the Labour Day public holiday signals that the summer is over and that autumn is now descending on the US.

This holiday weekend normally heralds massive post-summer sales and Halloween issues start to permeate the world of advertising and marketing.

However, every four years, the ending of the holiday weekend signifies something more significant, namely the final run in to the Presidential election in early November.