Letter: Trump’s tariff threats are arbitrary and unconstitutional

We all know that tariffs are a form of taxation. Historically, tariffs provided a significant portion of the revenue that financed the federal government, especially before the advent of income taxes early in the 20th century. Subsequent occurrences including wars and depressions seemed to affect public opinion and worldwide government practices by supposedly enlightened leadership resulting in increasingly free trade policies by most of the nations of the world. Imposition of tariffs historical