NEW YORK (AP) — Republicans have begun to concede defeat in the evolving fight to preserve the House majority.

The party's candidates may not go quietly, but from the Arizona mountains to suburban Denver to the cornfields of Iowa, the GOP's most powerful players this midterm season are actively shifting resources away from vulnerable Republican House candidates deemed too far gone and toward those thought to have a better chance of political survival.

And as they initiate a painful and strategic triage, the early Republican-on-Republican blame game has begun as well.

GOP operatives connected t...