"i shall ask the congress for the one remaining instrument to meet the crisis -- broad executive power to wage a war against the emergency, as great as the power that would be given me if we were in fact invaded by a foreign foe". which role of the presidency does this quote illustrate?
a. chief legislator
b. commander in chief
c. chief party leader
d. leading diplomat

b. commander in chief

Explanation:

A commander in chief, or supreme commander, is the person who has the supreme command of the whole or a significant part of the armed forces of a nation or, sometimes, of several allied nations. In most countries this position is exercised by the head of state or the head of government through the Minister of Defense or similar, thereby reinforcing the notion that it is the civil and political authority that is in charge of the armed forces.

there is an explationation of this on a site called crash   course world history 1