It indicates a vote in which no decision can be made, as neither side has the majority.
If a casting vote is available, this may be used to break the deadlock.
A split vote may arise from vote splitting, which occurs in an election when the existence of two or more similar candidates reduces the votes received by each of them, reducing the chances of any one of them winning against another, significantly different, candidate.
In systems that require a winning candidate to receive a majority of votes, this may result in a runoff election.
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