GOP Rep. Tony Gonzales of Texas is fighting to avoid defeat in a hotly contested Republican primary runoff Tuesday, with a challenger attacking him for taking bipartisan votes, including helping pass a new gun law in the wake of the school shooting in Uvalde in 2022.

Voters in Texas’ 23rd Congressional District, a massive U.S.-Mexico border district that stretches from the outskirts of San Antonio to El Paso, are choosing between Gonzales and conservative internet personality Brandon…