GOP voter suppression? No, can't think of any, unless you count asking people for a simple ID - obviously people that are too simple-minded, irresponsible, or just plain stupid and lazy, or it wouldn't be a problem - as voter suppression. Bet they can all find their ID when they need to buy beer!
Now Democratic voter supression in the days of the KKK, Dred Scott, and other horrors perpetrated on blacks by the Democratic party, well, whole books have been written about those instances. Nice try at revisionist history though!
Meanwhile, Googling "Chicago voter fraud" nets 478,000 results!