Wall Street has found a company that Donald Trump would love to beat up on (TDG)

Bloomberg TransDigm Group (TDG) is an airplane-parts makers that counts Boeing as one of its largest clients. The company's growth depends on debt-fueled acquisitions. After it acquires a company that makes unique aerospace parts, it raises the price of those parts. On Thursday the stock's price closed at $251, but Citron Research thinks it should be hovering around $166. Since his election to the office of the President of the United States, Donald Trump has spent much of his time tweeting thre...