How come we can't do an indelible ink finger (purple finger) when voting like in other countries where we try to encourage /assist fair elections? it would certainly prevent voting twice, and combined with voter ID, effectively eliminate the most common voting issues (intelligible voters through ID, multi-location voters with the ink)
Also, we try to do ID in other countries when we help, why is it wrong here? All the normal arguments (too hard to get, cost, etc) go out the window when you look at where we do it?