twice the estimated crowd that turned out for donald trump a week ago. two candidates attended the conference. things got tense during a town hall event saturday afternoon. black lives matter activists took the stage and confronted both men about racial injustice and spoke about the deaths of african-americans in police custody. most recently the death of sandra bland, a young black woman who officials say hanged herself in a jail cell last monday in texas. >> we are going to acknowledge the name of black women who have died in police custody and then, governor o'malley, we do have questions for you about what your agenda is going to be to make sure that black lives do matter and that as a leader of this nation, will you advance a racial justice agenda that will dismantle, not reform, not make progress but -- >> o'malley attempted to respond.