Planned Parenthood has been threatening this for months, but today they made it official by filing suit against the Center for Medical Progress, the group that caught them on video repeatedly admitting that they sold aborted baby parts. Democrats responded to the videos by pretending shock at the idea that video could be edited, even though CMP also released the full, unedited video concurrent with each release of a produced video.
They have since resorted to calling the videos "discredited" even though no one has discredited them at all, and even though they clearly show Planned Parenthood employees in their own words discussing the sale of aborted fetal tissue.
What's interesting is that Planned Parenthood has NOT sued CMP for slander or libel, which is to say, they are not claiming (as far as I can tell) that anything in the videos is actually false. They are merely claiming that the recordings were obtained in violation of applicable State and Federal privacy laws.
In other words, Planned Parenthood does not deny that they sold (and continue to sell) baby parts, they just object to how CMP went about proving that fact.