Social media giant Twitter is having a bittersweet moment, experiencing increasing popularity among users and financial woes at the same time. Along with growth in revenues, the firm has had to cut jobs and products to please Wall Street expectations of more profitability. Also worrying are forecasts of a deceleration in its user base, and concerns over trolling and harassment in tweets. These issues have reportedly turned off potential suitors like Google, Walt Disney & Co. and Salesforce.com in recent months. Ironically, Twitter has never been more influential, says Wharton professor of legal studies and business ethics Kevin Werbach . He points to the current U.S. presidential campaign, and notes, “I shudder to say it, but there would be no Donald Trump if it were not for Twitter.” (Twitter claims the three presidential debates generated an average of 3 billion Tweet impressions.) Twitter is central to every political campaign these days, he adds.…