- Julian Zelizer: Donald Trump hasn't demonstrated the set of skills needed to handle the powers and constraints of the presidency
- Temperament is a hugely important requirement for the White House, Zelizer 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)Donald Trump has a temperament problem.