Goods are produced where it is cheapest, and that place needs employees. If we make it cheaper to produce and sell a product here in the U.S., we will essentially create jobs. Lessening taxes on our own products will be an incentive for job creation, and raising taxes on imports is another.
It seems obvious to me. Increasing taxes on imported goods will cut into the profits of companies like Wal-Mart, which primarily sell imported goods from China. These companies would adapt to the change, and as a result, more goods produced within the U.S. would be on their shelves.
Reducing taxes on goods produced in the U.S. and exported from the U.S., will further promote production within our great country. Also, this would not change our current tax revenue if levied appropriately.