Marjorie Dannenfelser, the president of the anti-choice campaign group the Susan B. Anthony List, sent a letter yesterday to all of the remaining Republican presidential candidates, except for Ted Cruz and Marco Rubio, warning them against criticizing Cruz and Rubio for their extreme, no-exceptions stances on abortion rights.

Although Dannenfelser didn’t name names, Sen. Lindsey Graham of South Carolina, who endorsed Jeb Bush after dropping out of the presidential race himself, and Gov. Chris Christie both attacked Cruz and Rubio over their opposition to rape exceptions in separate Morning Joe interviews this week.

Graham said on the program that although he’s “pro-life,” he thinks Ted Cruz’s stance on exceptions would be “a hard sell with young women.”

“I may be wrong, and I hope I’m wrong, but I think it’s going to be very hard to grow the party among women if you’re gonna tell young women, ‘If you get raped, you’re gotta carry the child of the rapist,’” he said. “Most pro-life people don’t go there.”

Christie, meanwhile, said that Rubio’s no-exceptions policy is “the kind of position that New Hampshire voters would be really concerned about.”

The spat gets to the heart of the anti-choice movement’s long-running debate about whether to tolerate the inclusion of certain exceptions in legislation aimed at curtailing abortion rights in an attempt to broaden their appeal and give political cover to vulnerable lawmakers.

Dannenfelser has called rape exceptions “abominable,” “regrettable” and “intellectually dishonest,” but has made it clear that her group will back bills that include exceptions if they deem it necessary for those bills to pass. Graham takes a similarly pragmatic approach to the issue, pleading after a 20-week abortion ban he sponsored got caught up in a debate about the wording of its rape exception that the movement needed to “find a way out of this definitional problem with rape.”

But what Dannefelser seems to be most upset about is the fact that Christie and Graham talked about rape at all, which she says plays right into “Planned Parenthood’s talking points.” Indeed, after Republican Senate candidates Todd Akin and Richard Mourdock made disastrous comments about pregnancy from rape in 2012, Dannenfelser held trainings for Republicans to teach them how to avoid the subject.

In her letter to the candidates, Dannefelser notes that her organization, along with Rubio and Cruz, have supported legislation that includes exceptions, but purely as a political compromise. Attacking those candidates for their no-exceptions ideology, she says, is “incredibly damaging to the prolife movement at a point in which momentum is on our side.”

“Let me be clear: An attack on this aspect of these candidates’ pro-life positions is an attack on the pro-life movement as a whole,” she warned.