Tesla's annual profit sank to its lowest level in years as the company faces an array of challenges from increased competition to reputation issues due to CEO Elon Musk's political engagements.  The electric vehicle (EV) company on Wednesday reported that net income last year plunged 46% to $3.8 billion (€3.17 billion). It marked the second year in a row of steep declines. For the fourth quarter of last year, profits came in at $840 million, down from $2.1 billion a year earlier. Total revenue