In Atlantic City an official of a union involved in the anti-smoking push on Monday called for the head of the Atlantic City casino workers’ union, Donna DeCaprio, to resign for failing to protect her members from the dangers of secondhand smoke.DeCaprio is president of Local 54 of the Unite Here union, which opposes a smoking ban on the grounds that so much business would be lost by smokers taking their money elsewhere that it could cause one or more casinos to shut down, costing thousands of workers their jobs.