For its part, Tesla was downgraded to neutral from a buy rating by Goldman Sachs Group Inc. last week. The company’s shares have dropped as it moves forward with its plan to buy rooftop solar installer SolarCity Corp., which some analysts have deemed a risky bet. Musk is chairman of SolarCity, and his cousin Lyndon Rive serves as its chief executive officer.
Customers who purchase an electric vehicle can claim a $7,500 federal income tax credit and several states offer additional incentives, according to Tesla’s website.
Tesla will let Musk’s tweet “stand as a comment,” spokeswoman Alexis Georgeson said in an e-mail. The Clinton campaign didn’t immediately respond to a request for comment.