Here:
"The biggest reason [for the GOP fissure] has been the distance—the chasm—between the party elite at the top, who are more or less for illegal immigration, and the bulk of the party on the ground, who are opposed. In this case there is a chasm between elites concerned that they personally will look bigoted if they take action and voters concerned about who comes into America in the age of ISIS. It is a split, a distance; it is primarily the fault of the top, not the bottom; and Mr. Trump, who through his popularity could choose to be a bridge across the distance is instead functioning as a deepener of it."
