In America most trade is not across national borders but among the states. Levying tariffs on other states might make some workers temporarily better off, but the harms to the consumer would be great.
Constitutional Free Trade
The Constitution prohibits states from erecting trade restrictions against other states. The lack of restrictions among the states is a key ingredient to our vibrant economy that produces abundant opportunities for consumers and workers.
Understand the Risk
The benefits of free trade between states in America applies across international borders. Whether it is between people within a city, state, country, or the world, the benefits of trade abound to all involved.