The Supreme Court ruled North Carolina unconstitutionally relied on race to change voting districts after the 2010 census.
The court ruled two districts were given disproportionate amounts of black voters while being stripped of white voters.
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State officials argued the district lines were redrawn to give Republicans an advantage, not to disenfranchise black voters. But the Supreme Court agreed with the lower court's decision that the district lines were racially based, not politically based.
The contested district map was thrown out before the 2016 election. But Republican candidates still won 10 out of the state's 13 districts.
