James Talarico is talking up his beliefs and his status as a seminary student. Jasmine Crockett, his opponent, is the daughter of a pastor and is steeped in the Black church.

As Hispanic voters in the state have moved toward Republicans, both parties are trying to figure out the best way to appeal to them.

The primary race for Senate in Texas has become the most expensive on record, with John Cornyn and James Talarico heavily outspending their rivals. But Mr. Cornyn seems to be in trouble.

Politicians quickly cited the attack in their campaign messaging. Some Republicans called for stopping immigration, while Democrats called for gun control.