Sen. Mark Warner Expresses ‘Grave Concerns’ About Digital Ad Fraud in Letter to the FTC

It's his second missive to the agency in 2 months

Warner continues to show concern over digital ad fraud. Getty Images

U.S. Sen. Mark Warner, D-Va., sent a letter to the Federal Trade Commission today expressing “grave concerns” over the agency’s slow response to investigating digital ad fraud.

@martyswant martin.swant@adweek.com Marty Swant is a former technology staff writer for Adweek.