WASHINGTON - A US court on Thursday blocked a Texas law that would require voters to show photo identification before casting ballots, saying the measure would likely curtail the ability of minorities to vote in the Nov. 6 presidential election.

Evidence showed the law did the most harm to African Americans and Hispanics, who are more likely to live in poverty, Circuit Judge David Tatel wrote for a three-judge panel of the US District Court in Washington.

Those without the underlying documents to obtain ID would have to purchase them, discouraging poor voters, he wrote. During the July trial, lawyers from the US Department of Justice equated that purchase to an illegal poll tax.

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