President Donald Trump’s agenda to keep multiple Canadian products from being imported into the United States took effect Tuesday, marking the latest development in the trade war between Canada and the U.S. Trump previewed the ban on a variety of products, including certain alcoholic beverages, dairy products, and motorcycles, on Sept. 8, in response to tariffs Canada had slapped on the U.S.The ban, impacting nearly $1 billion in Canadian imports, took effect this week. The ban targets whey products used in protein powder, motorcycl …