Rep. Tim Ryan, an Ohio Democrat who has announced a run for the U.S. Senate in 2022, revealed Monday he has contracted COVID-19. "Today, I tested positive for COVID-19," the former presidential candidate wrote in a series of tweets. "While I'm currently experiencing mild symptoms, I'm grateful to have the protection of a safe and effective vaccine -- and I know without it, this illness could be much, much worse." "What we have learned over the last year and a half is that we are in this together, and I urge all Ohioans to help us crush this pandemic by...