The Illinois Supreme Court will hear oral arguments Wednesday on the state's controversial pension reform law.
Opponents of the pension overhaul, approved by the legislature and signed by former Gov. Pat Quinn in December 2013, say it violates the Illinois Constitution's pension clause, which states that contractual pension benefits cannot be reduced.
As for the state, it is expected to argue that it has "police powers" allowing it to change contractual benefits and that the law is vital to addressing the state's $111 billion pension shortfall.
In November, a Sangamon County Circuit Court judge ruled that Illinois' pension reform law is "unconstitutional and void in its entirety."