Democratic front-runner Joe Biden was speaking at a televised town hall Wednesday when the corner of his left eye appeared to fill with blood, bringing attention away from the issue of climate change at a time when his campaign is already batting back scrutiny about his age and health. The eye issue likely isn't serious and will go away on its own after a few days, but it came after reporters have been asking Biden about whether his age will get in the way of his pursuit of the White House and followed a string of verbal miscues. Biden is...