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the trail in florida, also weighing in on the police shootings of to tulsa and charlotte. >> we have two more names to add to a list of african-americans killed by police officers in these encounters. it's unbearable and it needs to become intolerable. >> reporter: clinton praising police, but admitting more work could be done to bring communities together. >> look, i know i don't have all the answers. i don't know anyone who does. but this is certain. too many people have lost their lives who shouldn't have. >> reporter: now we're just four days away from the first presidential debate, and there is concern within the trump campaign that he is not doing enough to prepare. hillary clinton is taking time off the trail to prepare, trump has a full schedule. he was going to focus more this weekend but now he's added an event. sources do tell us they've