"An existential question for the Republican Party"

The Washington Post is reporting White House Press Secretary's Josh Earnest's remarks about the violence at Trump rallies:

Earnest said that only Trump, among GOP candidates, is pursuing “a strategy to sow political divisions for their own benefit.”  He added that it's clear what Trump is up to, “But it’s not clear at all what the rest of the Republican Party is up to.” . . .  This is a significant, if not existential, question for leaders in the Republican Party to answer,” Earnest said.