It must be worse for cBS since it’s a large 6.2% MOE. No doubt it does not go the other way against Trump. It’s more like 36% for Trump in Iowa.
Iowa is not ideal Trump territory. If he “wins” (and with caucuses, I’m not sure what that means), I’ll be impressed. Usually some Christian “conservative” wins Iowa, ask President Santorum or President Huckabee how important that was.
I expect Trump to blow out the doors here in NH. After that, South Carolina will decide if it’s over or if it will be a longer slog.