Despite having participated in seven primary debates, Hillary Clinton and Bernie Sanders were only asked about abortion after appearing last night in a Fox News-hosted townhall — a milestone Charles Krauthammer called “semi-historic.”

“The moderators are always asking Republicans about the difficult issue of exceptions for the pro-life position, which is a serious question,” Krauthammer said on Tuesday’s Special Report. “But you never hear the same question asked about the difficult exceptions on the pro-choice side, meaning is there any time, anywhere, any time in the pregnancy when you would allow a regulation to prevent an abortion? Which is never asked, has to be asked, and was asked.”

Krauthammer encouraged future debate moderators to continue this “important” line of inquiry.