Gov. Haley Barbour, a Republican, says an ad placed by his Democratic challenger isn't true. In it, John Eaves uses a dirty car to describe Barbour's financial connections to his former Washington lobbying firm.
Barbour's campaign has asked all Mississippi TV stations pull the ad.
"We didn't have a choice," said WTOK general manager, Tim Walker, on the decision to continue airing the spot.
Walker said political ads paid for by a candidate or his or her political committee must be aired.
Barbour told The Associated Press before he took office that he had established a blind trust to handle his personal finances while governor.
However, Eaves says Barbour needs to come clean about the assets held in his trust for the past four years.
Barbour's camp takes issue with several parts of the ad. First, the claim that Barbour has clients other than the people of Mississippi; second, that he is receiving money from sources other than his blind trust.
Barbour says Eaves quoted an inaccurate article and made it the basis for his ad.
No Mississippi TV station has taken the spot in question off the air.