Lina Hidalgo, the Democratic elected executive of the nation’s third most populous county, which includes Houston, secured a narrow reelection Tuesday against well-funded Republican challenger Alexandra del Moral Mealer.\n\nMs. Hidalgo took many by surprise with her 2018 election to be Harris County judge—in Texas, a nonjudicial position that is akin to being mayor. The then-27-year-old Latina immigrant ousted Republican Ed Emmett, who had led the county for more than a decade.\n\nMs. Hidalgo has been considered a rising star in the Texas Democratic party and has used her profile to expand the county’s role over issues like early childhood education, immigration and the environment. She has faced off against Republican Gov. Greg Abbott on issues such as authority to impose mask mandates when the Covid-19 pandemic began in 2020.\n\nMs. Mealer made it a competitive race, raising some $8.6 million from July to October and criticizing Ms. Hidalgo over Harris County’s crime rates and the indictments of three of her staffers on accusations of tampering with records. Ms. Hidalgo, who raised $2.4 million during the same period, pushed back on the accusations.\n\nMs. Mealer conceded Wednesday morning, as full unofficial results showed her with just over 49% to Ms. Hidalgo's nearly 51%.