Elon Musk's efforts to shore up Twitter may now be costing Tesla. The automaker's stock is down almost 30% since he took over the social media company. His use of the social media platform to attack opponents is thrusting him into the political spotlight. Carter Evans reports. #news #elonmusk #tesla "CBS Evening News with Norah O'Donnell" delivers the latest news and original reporting, and goes beyond the headlines with context and depth. Catch the "CBS Evening News" weeknights at 6:30 p.m. ET on the CBS Television Network and at 10 p.m. ET on the CBS News app. Subscribe to the "CBS Evening News" YouTube channel: https://bit.ly/1S7Dhik Watch full episodes of "CBS Evening News": https://cbsn.ws/23XekKA Follow "CBS Evening News" on Instagram: https://bit.ly/1T8icTO Like "CBS Evening News" on Facebook: https://on.fb.me/1KxYobb Follow "CBS Evening News" on Twitter: https://bit.ly/1O3dTTe Download the CBS News app: https://cbsn.ws/1Xb1WC8 Try Paramount+ free: https://bit.ly/2OiW1kZ For video licensing inquiries, contact: licensing@veritone.com