A group will target Focus on the Family founder James Dobson for working against a proposed Indian casino that also was opposed by a client of lobbyist Jack Abramoff.
The ad campaign is from the Campaign to Defend the Constitution, which describes itself as an online grass roots movement to combat the growing influence of the religious right.
Focus' senior vice president of government and public policy, Tom Minnery, says Dobson wrote letters regarding a casino proposed by the Jena Band of Choctaw Indians in 2002, but never produced radio ads as the group alleges.
Abramoff fought the Jena proposal on behalf of another Indian tribe that has a casino.
In e-mails made public as part of a Senate investigation, Abramoff and former Christian Coalition executive director Ralph Reed took credit for getting Dobson to produce radio ads, which they said were useful.
Abramoff pleaded guilty to fraud in January and is cooperating in an investigation of influence-peddling on Capitol Hill.