Which of the president’s nine roles calls for him to set the nation’s foreign policy?

The role of the President as Chief Diplomat is the one that calls him to set the nation's foreign policy, in fact, it makes him its main designer. His power is so large that his rulings are followed both by the US and foreign parties.

The roles established for the President of the United States are the following:

mass production/ assembly line production

roosevelt essentially took the opposite approach as hoover in taking on the great depression. herbert hoover thought that america and its economy could naturally recover from the depression in due course, so he adamantly restrained the federal government from intervening on behalf of the people affected. on the other hand, roosevelt dramatically increased employment by expanding the federal government and establishing agencies that would aid in relieving some of the country's worst problems.