In what ways has the role of the vice president changed over time?

What will be an ideal response?

An ideal response will:
1, Include the idea that the vice presidency was considered an insignificant office, providing an example.
2, Tell that vice presidents were chosen to balance the ticket politically and/or geographically.
3, Identify that power depends on who has the offices of the vice presidency and the presidency.
4, Note that the modern vice president takes a much more prominent role, providing examples such as Dick Cheney, Joe Biden, Al Gore, and Walter Mondale.