The Congress finds that barriers to (and other distortions of) international trade are reducing the growth of foreign markets for the products of United States agriculture, industry, mining, and commerce, diminishing the intended mutual benefits of reciprocal trade concessions, adversely affecting the United States economy, preventing fair and equitable access to supplies, and preventing the development of open and nondiscriminatory trade among nations. The President is urged to take all appropriate and feasible steps within his power (including the full exercise of the rights of the United States under international agreements) to harmonize, reduce, or eliminate such barriers to (and other distortions of) international trade. The President is further urged to utilize the authority granted by subsection (b) to negotiate trade agreements with other countries and instrumentalities providing on a basis of mutuality for the harmonization, reduction, or elimination of such barriers to (and other distortions of) international trade. Nothing in this subsection shall be construed as prior approval of any legislation which may be necessary to implement an agreement concerning barriers to (or other distortions of) international trade.