A sales slump at Tesla (TSLA) has extended into the new year. In China, sales were down 11.5 percent in January. Tesla isn’t keeping up with fierce homegrown competition. For example, during the same period,

Though Tesla’s shares doubled over the past 12 months, they’ve had a tough run since the inauguration. Investors are waiting to see if Elon Musk can keep the company’s charmed run going.

Elon Musk's Tesla has seen a huge drop in sales in a number of European countries in recent weeks as the billionaire's involvement in politics has taken a toll on his business