Another thought came to mind regarding all this. Politicians love to talk and expound on things. If Biden had meant " supporters' " - possessive - he would have been expounding on those supporters' possessions - their characters and beliefs - as in, 'The only garbage I see floating out there is his supporters' racism, Nazi-ism, their misogyny, their attempts to destroy our democracy.' No politician would have wasted that opportunity or left unsaid the supporters' baggage. It was clear as a bell that he meant that PEOPLE were garbage - Trump's supporters.
Another thought came to mind regarding all this. Politicians love to talk and expound on things. If Biden had meant " supporters' " - possessive - he would have been expounding on those supporters' possessions - their characters and beliefs - as in, 'The only garbage I see floating out there is his supporters' racism, Nazi-ism, their misogyny, their attempts to destroy our democracy.' No politician would have wasted that opportunity or left unsaid the supporters' baggage. It was clear as a bell that he meant that PEOPLE were garbage - Trump's supporters.