Nebraska passed and signed a bill into law Tuesday April 13 that prohibits abortion after 20 weeks on the basis that fetuses at that stage of development can feel pain.  This law directly challenges the Supreme Court’s 1992 Casey decision, in which they said a state cannot place an undue burden on a woman’s right to an abortion prior to the point of viability, which is currently ~22-24 weeks.  This law, then, directly challenges the Supreme Court’s ruling, offering an alternative basis for prohibiting abortion, and which results in more restrictions against abortion.  The law will surely be challenged.  If it goes all the way to the Supreme Court, Nebraska will have to persuade the court that fetuses can feel pain at 20 weeks, and that the ability to feel pain should be the standard by which an “undue burden” is judged.  We’ll have to wait and see what happens.