Sen. Elizabeth Warren is calling on a federal watchdog to investigate Google for alleged abusive behavior in advertising, potentially adding to the tech giant’s regulatory woes. 

The Massachusetts Democrat, however, isn’t turning to the Justice Department, which already brought a historic antitrust case against the search giant. She wants the Commodity Futures Trading Commission to take on the case, arguing that the largely unregulated world of online advertising could fall under the jurisdiction of the country’s top derivative markets cop. 

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