"The United States is suffering from an excess of imports.Cheap foreign products are driving American firms out of business and leaving the U.S. economy in shambles."What is the meaning of this point of view?

What are absolute and comparative advantages?

Personal private property protection allows for greater entrepreneurial ventures, and thus an expanding economy and job growth; can import tariffs and quotas reduce the benefits of trade?

What are the mechanics of import tariffs and quotas and world price?