The US import ban on Canadian goods is justified

From the articleTrump expands Canada trade fight with sweeping ban on Canadian importsAlso in U.S. will ban dairy products, motorcycles and most alcoholic beverages from Canada, Trump bans some Canadian imports as North America trade war intensifies, Trump administration to ban some Canadian motorcycles, dairy, alcoholic beverages in trade war's latest escalation, Trump escalates trade war with Canada, moving to ban imports of some autos, dairy and alcohol