- Julian Zelizer says it's difficult for elected officials to tie themselves to Trump's incendiary rhetoric, and there's no way of telling what he'll say next
- He says there are powerful forces pushing at least some traditional Republicans to get behind Trump
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)What could possibly motivate a Republican to formally endorse Donald Trump and join his raucous brigade? With each primary and caucus victory, the pressure for prominent Republicans to take a stand on his candidacy greatly intensifies. But taking this step is not easy.