I think it’s similar to an IFB that television commentators wear so the control booth can talk to them during a broadcast.
Biden and his team recognize his cognitive decline and when he begins to stumble and forget where he is, they are there to remind him of where he is and what talking point to use.
The question is, during the debates will he be checked for something like this...
He will wear it and claim it’s just a hearing aid which will be BS.
The question is, during the debates will he be checked for something like this...
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Not a chance.