occurs when the number of choices selected by a voter in an election contest is less than the maximum number allowed for that contest. An undervote also occurs when no vote is cast for a single choice contest.
For example, a voter that is permitted to cast one vote for a presidential candidate and does not select a candidate has undervoted.
Voters are have the right to undervote if they choose to do so. Unlike an overvote, a ballot will not be cancelled or disqualified as the result of an undervote.
An undervote can be intentional for purposes including protest votes, tactical voting or abstention. Alternately undervotes can be unintentional and caused by many factors including poor ballot design.
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