USA Today: Saying Jack Dorsey is “the heart and soul of Twitter,” Twitter investor Chris Sacca has again called on the company’s board of directors to appoint Dorsey as CEO and put an end to a lengthy search that has frustrated Wall Street and undermined employee morale. “Employees, users, media partners, advertisers, and even recruits all love @jack,” Sacca said in a series of tweets. “Enough is enough.”