A top environmental group endorsed New Hampshire Gov. Maggie Hassan in her race against Republican Sen. Kelly Ayotte, despite Ayotte’s support for President Obama’s Clean Power Plan.

Michael Brune, executive director of the Sierra Club, said the Democrat has been a “strong advocate” for environmental policies in the state Senate and as governor. Despite Ayotte being one of the few Republicans in the Senate who supports President Obama’s Clean Power Plan, Hassan would be a stronger advocate for green policies, Brune said.