Harvard University faces a ``tricky moment'' with President Claudine Gay out but alumni such as Bill Ackman keeping up pressure on the school's board, Bloomberg's Sridhar Natarajan reports. -------- Follow Bloomberg for business news & analysis, up-to-the-minute market data, features, profiles and more: http://www.bloomberg.com Connect with us on... Twitter: https://twitter.com/business Facebook: https://www.facebook.com/bloombergbusiness Instagram: https://www.instagram.com/bloombergbusiness/