Gov. Martin O’Malley has introduced a one-minute radio ad that airs seven times a recording of his Republican opponent, former governor Bob Ehrlich, saying “Drill, baby, drill.”

“When 80,000 gallons of oil spilled in South Baltimore, Bob Ehrlich was the lobbyist representing the oil company,” a female’s voice says in the ad, referring to a 2008 spill. The speaker’s statement is sandwiched by Ehrlich’s recorded line.