Democrat Elizabeth Warren is touting her work setting up a consumer protection agency in a new ad for her US Senate campaign.

In the radio spot, Warren notes that the Consumer Financial Protection Bureau recently required credit card giant Capitol One to pay $210 million in refunds and fines for deceptive practices.

“We need a cop on the beat to make sure no one steals your purse on Main Street and no one steals your pension on Wall Street,” Warren says in the ad. It is already running statewide.

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The agency was created in 2010 by the Dodd-Frank financial regulatory act.

President Obama appointed Warren to set it up, but named her top deputy to run it last year after Republicans threatened to filibuster any confirmation vote amid complaints about the agency’s structure.

Warren returned home to Massachusetts and soon afterward announced her candidacy against Senator Scott Brown, the Republican incumbent.