PHILADELPHIA - Progressive Philadelphia District Attorney Larry Krasner survived a challenge in the Democratic primary that pit his progressive reforms against growing concern over a rising tide of homicides and gun crimes.Many pundits nationally saw the primary as the first referendum on whether a wave of prosecutors elected on promises of criminal justice reforms — measures like shorter probation and parole and a curtailing of cash bail that disproportionately keeps poor defendants confined pretrial — can survive a rising tide of gun violence and homicides across the country.He beat challenger Carlos Vega, who billed himself as a third option between traditional law-and-order prosecutions and reform.Philadelphia District Attorney Larry.