https://www.reuters.com/article/us-tesla-sec/sec-letters-claim-tesla-failed-to-oversee-musks-tweets-wsj-idUSKCN2DD4QN >U.S. securities watchdog told Tesla Inc last year that Chief Executive Officer Elon Musk's use of Twitter had twice violated a settlement requiring his tweets to be preapproved by company lawyers, the Wall Street Journal reported on Monday.