G.M. Chief Faces Ire of Senators in Hearing

WASHINGTON — The questions came faster and harder at Mary T. Barra on Wednesday.

After facing a House subcommittee investigating General Motors’ ignition-switch recall a day earlier, G.M.’s chief executive was bombarded with a more aggressive line of questioning by senators.

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Auto Regulators Dismissed Defect Tied to 13 Deaths

Federal safety regulators received more than 260 complaints over the last 11 years about General Motors vehicles that suddenly turned off while being driven, but they declined to investigate the problem, which G.M. now says is linked to 13 deaths and requires the recall of more than 1.6 million cars worldwide.

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