BYD's plans for a car plant in Mexico may be in limbo after Donald Trump became the next President of the United States.BYD has not issued a 'firm' project proposal to establish a car plant in Mexico.Progress on the potential BYD car plant in Mexico seems to have come to a halt after Trump's victory.Even if Trump does not impose 25% tariffs on goods from Mexico, he could decide to implement tariffs on goods from China, affecting BYD.