Hope Andrade, the first Latina to serve as Texas secretary of state, abruptly announced her resignation Tuesday in the wake of controversy over a so-called voter purge. “It has been the highest honor of my professional life to serve as the secretary of state for the greatest state in our nation,” she said in a statement announcing her departure. In a letter to Gov. Rick Perry, who in 2008 named her to the post in which she served as Texas’ chief elections officer, the San Antonio resident said her resignation would be effective Friday. There was no immediate word on her replacement.