Given that the Presidency is the Executive branch of government and the federal level and Executive branch roles and responsibilities are fully described by Article Two of the United States Constitution, therefore, the correct answer to the question is ARTICLE TWO.
Also, this statement was made by Richard Nixon the 37th President of the United States between 1969 to 1974.
As the branch most responsive to the will of the people (who elect its members), Congress has the power to pass laws, declare war, ratify treaties, and levy taxes. The executive branch conducts foreign affairs and commands the armed forces.