The black death because of how many people were dying and the lack of spare man power
Answer:
it's a political move.
Explanation:
they can win over other members of their party who may have supported the VP pick by teaming up with them even though they ran against in their primary.
it's a way to maximize voter turn out for their base.
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maybe in a case of state manhunt or state of emergency.
unlike monarchies elsewhere, the wrong Crown was not passed down within a family and said when I roam King died the Senate a group of wealthy landowners shows their next king they could even choose someone from outside of Rome