When a person is asked questions by a poll, are there any rational reasons why they might lie with their answers in order to achieve their goals for the election?
For example if they say they are voting for an opposing candidate, but vote for theirs, they know the poll will show stronger for the opposing candidate and the opposing candidate may may place less effort to win thinking they have larger support. In addition could it result in lower opposing voter turnout as people think the opposing candidate will win and higher for their own candidate that appears lower?