not only of bernie sanders, but also joe biden, who if he gets in this race, is expected to also appeal to african-americans. >> all right, nia-malika henderson, thank you so much, in hoover, alabama. we'll check back in with you when hillary clinton takes to the stage. and you can catch jake tapper's one-on-one interview tomorrow on "state of the union." and jake will also interview former republican presidential candidate mitt romney. it all starts tomorrow 9:00 a.m. eastern right here on cnn. we're also learning new details today from this month's campus massacre in oregon. the man who many called hero, chris mintz, is recalling what happened the day of the ho shooting, moment by moment. nine people were injured, including mintz, who was shot five times. cnn's nick valencia joining me now with more on his story. >> chris mintz did what a lot of people wish they had the courage to do when faced with extraordinary circumstances. he put aside his own safety to