The candidates for Illinois congressional seats heard all about it during visits with voters in August: Disgust with Washington. Dismay over accusations and negative advertising in Illinois’ state races. Lack of interest in the Nov. 4 election. While the complaints transcend party allegiances and demographic boundaries, Republicans are aiming to capitalize on the frustrations and predicted low voter turnout to take back a number of congressional districts across Illinois and help the GOP solidify its hold on the …