- Historically, October Surprises have had little effect on the outcome of presidential elections
- Julian Zelizer: But this year the October Surprise could have a more dramatic effect, in part thanks to technology
Julian Zelizer is a professor of history and public affairs at Princeton University and a New America fellow. He is the author of "Jimmy Carter" and "The Fierce Urgency of Now: Lyndon Johnson, Congress, and the Battle for the Great Society." The opinions expressed in this commentary are his.
(CNN)As September comes to an end, presidential-election observers are beginning to wonder if there will be an October Surprise. In a campaign where the unexpected has become normalized, both parties -- but particularly Democrats -- suspect that the next month could bring a shocking revelation.