Cindy McCain, the widow of Senator John McCain, on Tuesday became the latest prominent Republican voice to back Democratic presidential nominee Joe Biden in his bid to wrest the White House from President Donald Trump in November's election. Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en