When have Gallup's predictions been the least accurate?

Question

Quizplus · Accepted Answer

Gallup's predictions have been least accurate when there is a prominent third-party candidate. This is because third-party candidates can disrupt the traditional two-party system and create uncertainty in the election outcome. For example, in the 1992 presidential election, Gallup projected a close race between George H.W. Bush and Bill Clinton, but Ross Perot, a third-party candidate, won 19% of the popular vote, which was a higher percentage than any third-party candidate had won in over 80 years.

When Have Gallup's Predictions Been the Least Accurate