A couple of questions for all, from a non-USAian(1), to help me understand better:
“onerous ID laws” - how does this work? Do some states require very specific types of ID that are difficult to get?
“denial of access to voting services” - again, how does this work?
(1) Canadian here. 4th generation, white, male, with all the inherent biases and privileges. ID required when I vote is simple, up to and including a bill from Netflix with my name and address on it. Or a label from a prescription bottle. Or dozens of other items.
ETA: I 
Vi Hart and her videos.
