Barry Goldwater Jr., the son of the late conservative senator, is fighting to open the market for solar energy in Arizona. As chairman of pressure group Tell Utilities Solar Won't Be Killed, Goldwater is campaigning to prevent Arizona's largest utility company from changing rules that allow homeowners to sell excess energy from solar installations back to the grid. "The utilities are monopolies. They're not used to competition. That's what rooftop solar represents to them," Goldwater says.