Describe the primary roles of the Vice- President of the United States?

The primary responsibility of the Vice President of the United States is to be ready at a moment's notice to assume the Presidency if the President is unable to perform his duties. ... The Vice President also serves as the President of the United States Senate, where he or she casts the deciding vote in the case of a tie.

Explanation:

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.