For Republicans, Mounting Fears of Lasting Split

The Republican Party is facing a historic split over its fundamental principles and identity, as its once powerful establishment grapples with an eruption of class tensions, ethnic resentments and mistrust among working-class conservatives who are demanding a presidential nominee who represents their interests.

At family dinners and New Year’s parties, in conference calls and at private lunches, longtime Republicans are expressing a growing fear that the coming election could be shattering for the party, or reshape it in ways that leave it unrecognizable.

While warring party fa