Swing Vote
About “Swing Vote”:
A swing vote is a vote that is seen as potentially going to any one of a number of candidates in an election, or, in a two-party system, may go to either of the two dominant political parties. It usually comes from voters who are 'undecided' or who may change their preferences between candidates or parties. Such votes are usually sought after in election campaigns, since they can play a big role in determining the outcome.
