Democrats' pitch on reining in energy prices helped them handily win Tuesday’s elections, with several candidates promising to freeze utility rates. Democrats also notched seats in Georgia’s utilities commission for the first time in nearly 20 years, a clear rebuke of the Georgia Public Service Commission after it hiked electricity rates six times over the past two years. Georgia Power residential customers are now paying an extra $516 per year on their electric bill from two years ago. But Georgia is hardly alone. Surging electricity…