Canada and the U.S. share the world's longest border. Here's how the election could affect it

Spend just a few minutes at the border between Canada and the U.S. – the world's longest – and you'll see why trade is a vital lifeline. CTV National News got to the Windsor, Ont. border crossing shortly after dawn at the beginning of a multi-state road trip to witness dozens of transport trailers at a duty-free stop on the Canadian side fueling up and passing by.Download the CTV News App for breaking news alerts and video on all the top storiesMost of the goods they're hauling are c