A federal judge has upheld sweeping voting restrictions in North Carolina, which could be a key swing state in the November election. The ruling upholds North Carolina’s requirement of a photo ID to vote, as well as a week-long cut in early voting and restrictions barring people from registering and voting on the same day or from registering before their 18th birthday. Critics vowed to continue protesting the rules, which they say disproportionately impact African Americans, Latinos and the elderly.