The third and last remaining commissioner of the Texas utilities regulator resigned under pressure on Tuesday after the release of comments to investors vowing to protect utility profits and dismissing financial hits from a cold snap on municipal power companies. The resignation came soon after the disclosure of inflammatory comments by the Public Utility Commission Chair Arthur D’Andrea in a March 9 call with Bank of America utilities’ analysts. The call took place two days before he was to consider rescinding billions of dollars payment to utilities. His stance against repricing helped sink a proposal this week to cut $4.1...