https://www.cnbc.com/2018/03/19/sheryl-sandberg-should-replace-mark-zuckerberg-at-facebook-calacanis.html >Facebook CEO Mark Zuckerberg has done a "horrible, horrible" job handling the social media giant's latest crisis, technology investor Jason Calacanis told CNBC on Monday. >He said it's time for COO Sheryl Sandberg to step into the role.