Periods of low sun and wind, a weather pattern known as a Dunkelflaute ... Harry Lawlor for The New York Times The cost of running these power plants is higher, which drives up prices when ...
By Nate Cohn The 2012 Obama-Romney race was the last in a familiar pattern.Credit...Doug Mills/The New York Times When Barack Obama won re-election in 2012, it seemed to mark the beginning of a ...