Opinion polls can lead to tactical voting which may have unintended outcomes.  Tactical voting is the purposeful casting of votes to sway an outcome. When the outcome is predicted in an opinion poll, it can influence voters to possibly cast a ballot differently than had that poll information not existed. This means that the votes are being cast based upon inaccurate assumptions. For instance, in the 1992 U.K. elections all polls predicted a Labour victory. However, against all expectations, the Conservatives won. It is wholly possible that many people, ensured of a seeming Labour victory, then decided to vote for the Conservatives tactically to ensure that there would be a balance in the House of Commons – or even out of sympathy, the ‘underdog effect’. [1] Or decided to vote for their first preference minor party, such as the liberal democrats, because they believed the Conservatives would be voted out without their needing to cast their votes tactically for Labour. Thus, it is possible that the voters didn’t accomplish the government they actually wanted, as they cast votes based on opinion polls. The unintended outcomes are a result of these opinion polls and tactical voting.  [1] Traugott, Michael W., and Lavrakas, Paul J., The Voter’s Guide to Election Polls, Fourth Edition, Rowman &amp; Littlefield Publishers, 2008,  p.202