Tesla stock dropped 14%, the most since March, following a spar between Trump and Elon Musk over the budget bill.The feud led to Tesla shares plunging as much as 18% on Thursday, marking its biggest intraday drop since September 2020.Shares of the carmaker closed 14% lower, the largest closing loss since March, amid the ongoing disagreement.The conflict between Trump and Musk has impacted Tesla's stock, with concerns rising about potential punitive actions affecting the company.