Joe Biden was photographed wearing a Donald Trump hat on Wednesday. The president quickly put a red “Trump 2024” hat on his hat as he greeted firefighters in Shanksville, Pennsylvania, during a memorial service for the September 11 terrorist attacks. Some say this is evidence that Biden is suffering from cognitive decline while others make the ridiculous claim that this shows he has switched to supporting Trump instead of his vice president, Kamala Harris, whom he endorsed after abandoning his re-election campaign.