This story from NPR was an excellent demonstration of what looks like a subtle bias in legislator’s Voter ID positions (and by extension, pretty much everything all of us do).
There was very strong correlation between Republicans who had failed to respond to the Latino constituent, and the ones who sponsored such laws.
“Republicans who support voter identification are different than those Republicans who did not support voter identification,” Grose says. “Among those Republicans who did support voter ID laws, the Latino constituent was very unlikely to receive a response from their elected official. The difference was almost 40 percentage points, which is just one of the largest gaps I have ever seen.”