- Super Tuesday isn't what it was intended to be but still can have huge impact on the presidential primary races, says Julian Zelizer
- Challengers to front-runners Trump and Clinton have a lot at stake, he says
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)March 1 will be a big day for both parties. On Super Tuesday, 12 states and one U.S. territory will hold their primaries and caucuses. At stake are 595 delegates for the Republicans and 865 for the Democrats.