- Trump has mastered playing roles, including on "The Apprentice," Michael D'Antonio says
- The one Trump has to play to win the White House is the most challenging, he writes
- He has repeatedly promised he can be "unifier," but role has eluded him, D'Antonio says
Michael D'Antonio is the author of the new book "Never Enough: Donald Trump and the Pursuit of Success." The opinions expressed in this commentary are his.
(CNN)Not since Ronald Reagan have we seen a presidential candidate so experienced at playing dramatic roles. Yet as the Republican primary season enters its final two months, Donald Trump is being called upon to play a role that has eluded him -- and that could determine whether he follows Reagan's path to the White House.