Donald Trump continues to rewrite American politics. The Republican nomination is now within his reach but by no means certain; the calendar makes him unlikely to reach it prior to June 7. That gives him nearly three months to unify a party in active and open rebellion against his nascent leadership. He will be racing against Ted Cruz — unpalatable to the GOP establishment, but far more popular with many mainstream Republicans.
It is an understatement to say that party unification will require Trump to shift strategy, but unification is critical if he hopes to assume the presidency. A metaphor from the business world may prove instructive.
"Republican," "Democrat," and "Trump" are all valuable brands. Until recently, few would have mentioned them in the same sentence. The former two, tarnished though they may appear, are the premier political brands in the United States; the third is a mark of wealth, entertainment and celebrity.