The liberal justice wrote that the death penalty is unreliable, arbitrary, cruel and increasingly unusual.
It will take more than one court ruling to end the legislative tinkering that produces 'safe' districts, election reform advocates say.
But another potential candidate could take the Hillary Clinton challenge that Sanders started, and build on it: Joe Biden.
The vice president's recent poll standings offer a sense of what kind of interest he could drive in a hypothetical campaign.
The rebuff is a victory for the Obama administration and voting- and minority-rights groups.
The brand overhaul comes nearly two months after he jumped into the race.
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