Preemption of local smoke-free air ordinances: the implications of judicial opinions for meeting national health objectives.

Elimination of state laws that preempt local antismoking ordinances is a national health objective. However, the tobacco industry and its supporters have continued to pursue state-level preemption of local tobacco control ordinances as part of an apparent strategy to avoid the diffusion of grassroots antismoking initiatives. And, an increasing number of challenges to local ordinances by the tobacco industry and persons supported by the tobacco industry are being decided in state supreme courts and courts of appeals.