Dole is using a logical fallacy known as an ad hominemargument - directed at the person, rather than the merit of what they are saying. Notice that he doesn't argue that McClellan's statements are not true. And by the way, Dole knows fully well that if McClellan spoke up back then....
The recall comes after a salad sample yielded a positive result for the bacteria in a random test by the Georgia Department of Agriculture, the company said in the notice. The recalled products include: 24-ounce Dole Garden Salad with lot codes N28205A and N28205B on the upper right corner...