Tariffs are not restrictions.
The United States of America had import tariffs most of our long, world-leading history.
It is now, that we no longer encourage our own manufacturing, that we are rapidly collapsing.
American manufacturing has never been more heavily saddled with government regulations, taxes, and Union workers contracts than they are now. American industry has had many fears of being put out of business by foreign firms, beginning in the 1800's with the rise of England as a manufacturing power. Well as you know, it survived. Given the changes in technology, America may not be the most cost effective producers of lower tech manufacturing. Firms can do better with high tech manufacturing and the service industry. I would point out that manufacturing is still 20% of our economy, and given the rise costs of production in China is expected to rise again. I always find it baffling at best when conservatives support big government solution to any problem.