Traditionally and constitutionally, the President carries out the roles of commander in chief and chief executive.
Explanation:
The President of the United States is an office in the United States of America, currently held by President Donald Trump. The office constitutes the federal executive authority of the country, and the holder is both the chief of state (as the President represents the supreme authority within the nation), chief of government (he carries out the executive functions of government) and commander-in-chief of the armed forces (he is the supreme leader of the American military). The official title of the Constitution is the President of the United States (abbreviated as POTUS). In total, 45 different people have been the President of the United States.
The general consensus amongst the Civil Rights leaders during World War II was that the fighting in World War II would advance the cause of the Civil Rights movement as people would see the paradox of discriminating against the very people who were helping to protect American values by fighting for their country.