President Donald Trump has mocked his Democratic rival for letting his maskhang off his ear when he delivers speeches.
Speaking to rally-goers inPennsylvania, Mr Trump said: "Did you ever see a man who likes a mask as muchas him?
"He has it hanging down.
Because it gives him a feeling of security.If I were a psychiatrist, right, you know I'd say: 'This guy's got some bigissues.
Hanging down.
Hanging down'."