An Ontario ad about Ronald Reagan's dislike for tariffs is causing trade war chaos. What did Reagan really believe about free trade, and why does it seem to be such a sensitive subject for the Trump administration? »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://www.tiktok.com/@cbcnews Subscribe to CBC News on Snapchat: https://bit.ly/3leaWsr Download the CBC