charges, though, that he calls a lie. here is david muir. >> reporter: the report published by the "nation" magazine claims radio host and former cnn archer lou dobbs long been outspoken when it comes to undocumented workers and the employers who hire them has relied on undocumented workers himself. >> at the very same time that lou dobbs was talking on cnn about the possibility of felony charges for employers who hire undocumented workers, there were undocumented workers caring for his million dollar show-jumping horses. and undocumented workers caring for the grounds of his estate. now in fairness, lou dobbs says i did not hire these people. >> whether he hired them himself or whether he hired contractors who then hired them, the fact of the matter is that, there were undocumented workers. >> reporter: dobbs who has not without a run for political office took on the claims and the reporter. >> a young lady by the name of isabel macdonald, a report for