"My first impression is that it's a great victory," Vera said. "Just a little disappointed."
Federal court orders Texas voting map changes ahead of 2018 →
He says he filed the challenge Monday on behalf of a small town near the border with Mexico called El Cenizo, which has had a "safe haven" ordinance since 1999 that prohibits city employees from asking about a person's immigration status.
United Latin American Citizens file lawsuit on Sanctuary Cities ban in Texas →