This fraud has been around for a long time if it is true.
Alas, many Republican leaders are more interested in getting crumbs from Democrats than in fighting voter fraud. We never had a Reagan revolution in Illinois.
Here is proof
http://moritzlaw.osu.edu/electionlaw/election06/IllinoisElectionOverviewNovember2006.php
The Illinois November election involved serious voting administration problems, many of which had occurred previously in the March primary
Overall, Cook County officials received approximately 1,500 complaints about the countys voting machines. Vote does not compute: County logs 1,500 gripes on machines, Chicago Sun-Times, December 11, 2006. Apart from the problems described above, officials also received reports of machines altering voters ballot choices. This phenomenon led to allegations that some machines had been rigged.