- Julian Zelizer: It's too late for Republicans to realize what's been obvious
- Trump has wallowed in sexism and racism for years, Zelizer says
- Zelizer: The Trump train wreck is one of the Republicans' own making.
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 own.
(CNN)Republicans are acting as if they are in a state of shock about their nominee.