Joe Biden's phone call to former campaign staffers on Monday has sparked new theories on the president's health after an odd moment between the president and Kamala Harris. The 81-year-old spoke in a scratchy voice from COVID isolation at his Rehoboth Beach, Delaware, home and told Harris: 'I'm watching you kid'. However, many noted a strange exchange between the vice president and her boss, who has not been seen in five days and since he shocked the world by dropping out of the race via a letter posted to social media on Sunday. The new presumptive Democratic nominee Harris said:...