- Julian Zelizer says the victory of Donald Trump puts a number of top Republicans on the spot as they have to decide whether to back him
- Even some of those Trump attacked in slashing ways may find themselves under great pressure to support him, 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. (This article has been updated with news about statements by Paul Ryan, Mitch McConnell and Donald Trump.)
(CNN)Now that Republicans have their nominee, the party elites have a big choice to make. With Donald Trump winning by sizable majorities in the last few rounds of primaries there will be growing pressure for Republican leaders to back the ticket. Some are indicating that they won't give into this pressure. "Republicans for Clinton" have started to express their opinion via social media.