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After calling for unity, Trump voices familiar grievances

Former President Donald Trump described in detail what happened when a gunman tried to assassinate him last Saturday at a Pennsylvania campaign rally. Mr. Trump paid tribute to Corey Comperatore, who was killed in the attack and was buried on Friday. In the longest convention speech ever, Mr. Trump said he was running to be president for all of America, but also repeated familiar grievances and insults. NBC News' Hallie Jackson reports.