A group of voters is challenging the validity of a measure on this fall's ballot that would make it more difficult to improve retirement benefits for public employees.
In a statement Thursday, Republican state Senate candidate John Bambenek, of Champaign, said he and 10 other Illinois residents filed a lawsuit arguing the question is unconstitutional.
Bambenek says the form of the question and the amendment are ``deceptive, inaccurate and incomprehensible.''
If approved, the proposed constitutional amendment would require a three-fifths vote instead of a simple majority for any pension increase. Cutting benefits would still require just a simple majority.
The lawsuit against the Illinois State Board of Elections was filed in Champaign County Circuit Court.
A hearing date has not been set.
