WASHINGTON (AP) — President Donald Trump said Thursday that he will leave the White House if the Electoral College formalizes President-Elect Joe Biden’s victory — even as he insisted such a decision would be a “mistake” — as he spent his Thanksgiving renewing baseless claims that “massive fraud” and crooked officials in battleground states caused his election defeat. “Certainly I will. But you know that,” Trump said Thursday when asked whether he would vacate the building, allowing a peaceful transition of power in January. But Trump — taking questions for the first time since Election Day — insisted that “a...