If you don't recognize the name Juan Francisco Lopez-Sanchez, don't worry: You will. He's not a candidate for president, but before long he'll have higher name recognition than Jeb Bush.
A felon convicted on several drug charges, the Mexican national had been deported five times but managed to get back into the country. He has been arrested for the apparently random murder of 32-year-old Kate Steinle in San Francisco on July 1. For anti-immigration advocates, his case starkly exposes everything that is wrong with our immigration policies. Steven Chapman analyzes the arguments.