Beshear on Saturday told the shouting crowd he has a record of winning complex cases as an attorney, while his opponent's law practice included debt-collecting cases. Westerfield said his prosecutorial background prepared him for the job, and said Beshear would need on-the-job training.
The attorney general's race highlighted speeches by down-ballot candidates.
Beshear is the son of Gov. Steve Beshear. Westerfield, a state senator, said it makes no sense to elect another Beshear.
Andy Beshear poked fun at Westerfield for a personnel file that suggested as a young prosecutor, the Republican sometimes put personal interests including pedicures ahead of his job.