Canadian travel to the U.S. has plummeted as the trade war escalates between the two countries. But just how much of a blow is this to the U.S. economy? Andrew Chang explains how much travel has declined and who might feel it most. Images provided by Getty Images, The Canadian Press and Reuters. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC News Online: For breaking news, video, audio and in-depth coverage: http://bit.ly/1Z0m6iX Follow CBC News on TikTok: