A group of retired Illinois teachers and administrators have filed a lawsuit over the states new plan to solve its pension crisis.
The suit is seeking to have the plan to reduce the state's $100 billion pension shortfall declared unconstitutional.
Supporters of the plan believe the Illinois Supreme Court will uphold it because the law is necessary to repair the state's finances and ensure retirement funds remain solvent.
Opponents say it violates a provision of the Illinois Constitution that says pension benefits may not be diminished.
The plan is estimated to save the state $160 billion, largely by cutting benefits for employees and retirees.