Tesla ( TSLA -0.52%) stock is on the move again, and for the wrong reasons. The automaker's stock fell 7% on Monday after Wedbush analyst Dan Ives issued a grim report in response to CEO Elon Musk's plans to start a new political party.

Musk has been able to play off Tesla's struggles for over a year now because the stock has been astonishingly resilient. Neither political gaffe nor falling deliveries has knocked Tesla off its upward trajectory, but Monday's selloff may be a sign of a changing sentiment.