An aide to Democratic presidential candidate Bernie Sanders
Bernard (Bernie) SandersBooker placing staffers in Iowa: report Democrats must reconcile party factions to raise blue wave odds Booker to keynote Dem gala in Iowa MORE said Thursday evening that rival Hillary Clinton
Hillary Diane Rodham ClintonSan Juan mayor endorses Cynthia Nixon in New York gov race Hillary Clinton thanks Ralph Lauren at 50th anniversary show Trump tax law takes center stage in Nevada Senate race MORE "should be ashamed" of her association with longtime ally David Brock.
"He doesn’t need lectures on civil rights and racial issues from David Brock, the head of a Hillary Clinton super PAC," Briggs said in the statement.
Brock had remarked to The Associated Press earlier in the day that a new Sanders ad depicting overwhelmingly white supporters was a "significant slight to the Democratic base."