Last week if you told me you had “Trump accuses Kamala Harris of racefaking in front of an audience of black journalists” on your bingo card, I would’ve chastised you for an incredibly poor-taste joke, but apparently you can mark that square today
So, something to understand is that he does not listen to his advisors or follow the strategy they set out for him, almost ever. His campaign strategists and advisors have been pretty staunchly pushing the GOP and the public-facing side of the campaign to avoid attacks on the basis of race or gender, because it loses them poll numbers and gains her support. This hasn’t stopped him, or any of the other Republicans, they just can’t help themselves, but his advisors are practically begging him to cut this shit out. The other important thing to understand about this event is that the appearance was cut short because his own campaign requested they end it, that’s how bad a job he did following his advisors’ strategy