Silencing of Trump Exposes Tensions Within Twitter

The deactivation of President Donald Trump’s Twitter account by a rogue employee was the most public sign yet that Twitter’s greatest star can also cause the company great headaches.

Twitter blamed the incident—which took Mr. Trump’s @realdonaldtrump account offline for 11 minutes late Thursday—on actions taken by a customer-support employee on his or her last day of work. Twitter said it was taking measures “to prevent this from happening again.”