WASHINGTON (Reuters) -A recount has confirmed U.S. Representative Henry Cuellar defeated progressive challenger Jessica Cisneros by a razor-thin margin, the Texas Democratic Party said on Tuesday, following a high-profile Democratic primary battle focused on abortion rights. The election in a district along the U.S.-Mexico border was a rematch between Cuellar, a moderate who has held the seat since 2005, and Cisneros, a 29-year-old attorney who failed to unseat him in 2020 but forced him to a runoff following this year’s March primary. Cuellar edged Cisneros by a scant 289 votes out of more th…