Wisconsin’s Supreme Court election this spring will decide just one seat, but the contest already is shaping up as one of the most costly and contentious battles of the new year – with the control of the seven-member court and the fate of a 19th century abortion ban hanging in the balance.

The case is set to test states' conflicting abortion laws, a battle that could rise to the U.S. Supreme Court.

The U.S. Supreme Court declined on Monday to hear a challenge to the legality of buffer zones used to protect access to abortion clinics and limit harassment of patients in a challenge brought by anti-abortion activists who have argued that their free speech rights were being violated.

The Supreme Court opted against hearing arguments in a pair of appeals Monday seeking to wipe out protest buffer zones around abortion clinics – a move that, for now, will leave those restrictions in place.

"Cities and states across America are denying sidewalk counselors and law-abiding citizens their rights to inform women about their options."

The Supreme Court turned away two appeals asking the justices to overrule a 25-year-old decision that allowed for buffer zones around abortion clinics.

For nearly three years, it has seemed inevitable that the Supreme Court would strike down the “buffer zones” that restrict protests near the entrances of reproductive health clinics. A majority of the court has already castigated these laws—and past precedent upholding them—as a subversion of anti-abortion protesters’ First Amendment rights.