The law — signed Friday by Walker in a private ceremony — would cut the number of clinics offering abortions in Wisconsin from four to two, and one of the remaining clinics would have to dramatically cut the number of abortions it provides, according to the operators of the clinics.
Backers of the law, which also requires women seeking abortions to get ultrasounds, said they were not worried about the lawsuit.
"We are confident this bill will be held to be constitutional," said Susan Armacost, legislative director for Wisconsin Right to Life.