Donald J. Trump / @[email protected]: I am pleased to announce that David O. Sacks will be the "White House A.I. & Crypto Czar." In this important role, David will guide policy for the Administration in Artificial Intelligence and Cryptocurrency, two areas critical to the future of American competitiveness. ... ...David Sacks has been an extremely successful entrepreneur and investor for 25 years, building and investing in some of the most iconic companies in Silicon Valley. He was PayPal's founding-era COO, part of the legendary "PayPal Mafia." David then founded enterprise software company, Yammer, which was acquired by Microsoft for $1.2 Billion Dollars. ...