WASHINGTON — America’s employers added 12,000 jobs in October, a total that economists say was held down by the effects of strikes and hurricanes that left many workers temporarily off payrolls. The report provided a somewhat blurry view of the job market at the end of a presidential race that has pivoted heavily on voters’ feelings about the economy. Last month’s hiring gain was down significantly from the 223,000 jobs that were added in September. But economists have estimated that hurricanes Helene and Milton, combined with strikes at Boeing and elsewhere, …