Abortion-rights groups are calling on CBS to pull an advertisement by the Christian advocacy organization Focus on the Family, which the network has accepted for airing during next month’s Super Bowl, write The Washington Post and the Los Angeles Times.

The critics cite past instances in which the network rejected advocacy ads from groups such as the liberal organization MoveOn.org and the pro-gay-rights group United Church of Christ.

CBS said it had already altered its policy on such commercials before it agreed to sell time to Focus on the Family for an ad featuring University of Florida football star and evangelical Christian Tim Tebow and his mother. The network said it would “continue to consider responsibly produced ads from all groups for the few remaining spots in Super Bowl XLIV.”

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