( July 30, 2025, 8:51 AM EDT) -- ST. LOUIS — An Iowa state official filed an appellant brief in the Eighth Circuit U.S. Court of Appeals arguing that a federal court erred by enjoining the state’s new law regulating sales of e-cigarettes as preempted by federal tobacco regulations pursuant to a challenge brought by a vaping advocacy association and five vape companies, writing that Eighth Circuit precedent allows state regulation of tobacco sales....