How to assure the quality of a foreign commerce policy through the concomitant increment (I) of the efficient delegation from the Legislative to the Executive of powers for establishing and implementing it and (2) of the full operation of the checks and balances which allow for the control of the Executive in Presidential systems? The Brazilian institutional design is lacking on both these dimensions in what concerns the foreign commerce policy, argue the authors. An alternate design is needed, one that takes into account the constitutional democratic demands without loss of efficiency in the decisions belonging to the Executive.