Musk Claims SEC ‘Misconduct’ as He Seeks End to Limits on Tweets

Elon Musk accused the U.S. Securities and Exchange Commission of “misconduct” as the Tesla Inc. chief executive officer seeks to exit a 2018 deal with the regulator that limits his Twitter posts about the electric car maker.

Musk wants to block an SEC subpoena seeking information about Tesla’s public-disclosure controls and to undo a set of court orders he and his company agreed to in 2018, which led to reviews of his company-related tweets by an in-house official who’s been referred to as the CEO’s “Twitter Sitter.”

“The SEC argues that it has unfettered authority to subpoena whatever it wants, ...