Several major automakers are making big bets on electric vehicles. But so far, the US EV market, seems to belong to one automaker: Tesla. For years, skeptics have warned of a tsunami of competitors coming for the pioneering electric car brand. A few vehicles have been released so far, but sales indicate that not one of them has failed to make a significant dent in Tesla's share of the EV market. So, who are they? And how much of a chance do they have?