Murder is still murder, no matter what the circumstances. And what ever happened to parents putting their children before themselves? About the "three exceptions rule," there would be no way to prove them, and therefore legislation against the rest of abortions would be useless. McCain has said in such cases the women should be given the benefit of the doubt, but I don't expect a murderer not to be a liar as well.
Also, murder is a legal term that pertains to the killing of a person. A fetus is not a persson. So, as much as I agree with you that abortion is wrong, except in the case of saving the mothers life, and that abortion on demand is an abomination, it can't considered murder. Maybe in the Biblical sense, but certainly not in the modern legal textual term.