SAN FRANCISCO (KPIX) – A federal investigation has been officially launched into whether electronic cigarette company
JUUL’s political ads were legal.

The San Francisco-based company’s campaign for Proposition C, which would overturn the city’s ban on e-cigarettes, says vaping products are safer then cigarettes.

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The Food and Drug Administration says that is an unproven claim that can’t be made until there is scientific evidence.

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Prop C goes to the voters in November.

Meanwhile, Walmart, the nation’s largest retailer is going to stop selling e-cigarettes at all its stores.

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Walmart made the announcement, as the number of deaths and illnesses related to vaping grows.