Following the narrow defeat, Dornan alleged that Sanchez's winning margin was provided by illegal voting from non-U.S. citizens. A thirteen-month House of Representatives investigation ensued, during which Sanchez was seated provisionally, pending the inquiry. A task force found 748 votes that had been cast illegally—624 from non-citizens in addition to 124 that had already been thrown out by California officials. This was not enough to overturn Sanchez's margin of victory and she was allowed to keep her seat. However, in consultation with the INS, the House committee identified 4,762 questionable registration affidavits.