that's part of my point. 58% white non-Hispanic in the Census could well mean 65% or 70% of likely voters.
okay, but I don't see the comparison with the Deep South in that case.
As states are allocated representation based on census estimates rather than voter registration rolls, the Deep South, which was oppressing the voting rights of the most people, would then have communities voting for racist Democrats when they were majority black. Arizona is a less extreme example of a similar, but obviously not identical, situation. And it's entirely possible that 50.1%+ of the Maricopa county adult population approves of Arpaio's tactics, after all. Or did at some point in the recent past.