( May 5, 2025, 12:42 PM EDT) -- DES MOINES, Iowa — An Iowa federal judge on May 2 granted a motion filed by a vaping advocacy association and five vape companies to preliminarily enjoin the state’s new law regulating sales of e-cigarettes as preempted by federal tobacco regulations but rejected the plaintiffs’ argument that the state’s “differential treatment” of synthetic nicotine vapes violates equal protection....