Right-wing commentator Charlie Kirk has posted a rumor that President Joe Biden had a medical emergency in Las Vegas last week and may be in hospice care. This claim contradicted the official account of the president's COVID-19 diagnosis, and has sparked widespread speculation, but what are the facts? Kirk, who has a history of promoting questionable theories, shared the rumor Monday on X, formerly Twitter. He wrote: "Got a weird lead on a story that people should look into. I got a call from a source close to Las Vegas Metro. The official story was that Joe Biden's trip was...