"In his concession speech to supporters Tuesday night, Mr. Cantor, who has served seven terms, didn't indicate whether he would run in November as a write-in candidate, as allowed under state law."
Obviously I read it too quickly. It was from a WSJ article from this morning. Apologies.
When the GOPe guy wins, we are expected to rally behind him. However, when the conservative or non-establishment guy wins, the GOPe does not accept the result and either gives lukewarm support to the nominee (and little money) or does a Murkowski and goes rogue. Either way, it is destructive.