Tesla still has a commanding lead in the US EV market, but competition is slowly catching up.ANGELA WEISS / AFPTesla stands to benefit from any removal of consumer tax credits on electric vehicle purchases.The move could hurt competitors more, CEO Elon Musk said.Tesla makes a vast majority of EVs sold in the US, but its lead has started to slip slightly.Elon Musk supports a Trump plan to end tax credits of up to $7,500 for electric vehicle purchases.That might sound confusing: Why would the CEO of Tesla want to end a program that makes it cheaper for people to buy EVs?Well, according to Musk, it would devastate Tesla's rivals.