Workers at America's largest wholesale retailer may soon go on strike as the corporation has seen profits skyrocket in recent years, union officials said. Costco workers nationwide voted by an overwhelming 85-percent margin to authorize a strike,

With a master agreement with the Teamsters set to expire in 10 days, affecting 18,000 of the retailer's workers, hundreds last week held practice pickets.

The more than 18,000 Costco Wholesale employees represented by the Teamsters union voted overwhelmingly to authorize a nationwide strike should they not reach a new labor agreement by the end of the month.