Rita Sklar, executive director of the American Civil Liberties Union of Arkansas, speaks during a news conference at the Arkansas state Capitol in Little Rock, Ark., Tuesday, April 16, 2013. Abortion rights proponents filed a federal lawsuit Tuesday to block Arkansas' new abortion law, which is among the most restrictive in the nation. (AP Photo/Danny Johnston)LITTLE ROCK, Ark. (AP) — Abortion rights advocates filed a lawsuit Tuesday that seeks to overturn the more restrictive of Arkansas' two new abortion regulations, announcing the near-ban of abortions from the twelfth week of being pregnant onward is unconstitutional.