Direct abortion is murder.
What do you suppose Kmiec is going to do with the 30 pieces of silver he sold the Church for?
Direct abortion, that is, one that is willed as an end in itself, is always gravely immoral. However, it is morally licit for pregnant mothers to submit to treatment for medical conditions that may have the unintended effect of terminating the pregnancy, as long as that termination isn’t what’s directly intended by the treatment. For example, mothers may receive chemo and/or radiation for the treatment of cancer.