Republican Mayra Flores defeated the leading Democratic candidate for an open congressional seat in a historically blue region of South Texas in a Tuesday special election.  Flores, who will be the first Mexican-born congresswoman, garnered about 51% of the vote to top Dan Sanchez, who received 43% of the vote with all precincts reporting.  The seat had been vacated in March by former Democratic Rep. Filemon Vela.  Shortly after 9:30 p.m., Flores declared victory at her election party in

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