Question

What has become the basis of the election?

Answer 1

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But other reasons occur when the incumbent becomes ineligible to continue in office (criminal conviction, or failure to maintain a minimum attendance in the office or due to election ...

Answer 2

Answer:

The nature of democracy is that elected officials are accountable to the people, and they must return to the voters at prescribed intervals to seek their mandate to continue in office. For that reason most democratic constitutions provide that elections are held at fixed regular intervals.