President Donald Trump’s repeated Twitter attacks on Amazon have already dented the e-commerce giant’s stock price. But if he really wants to hammer the company and its ultra-billionaire CEO Jeff Bezos, the president has some tools at his disposal — using the government’s spending and regulating powers.

Whether Trump or his allies will actually use any of those weapons is unclear. But they could cause a variety of headaches for Amazon, one of the world’s biggest retailers — a company that until now hasn’t faced much resistance to its skyrocketing growth.

Here’s a look at the threats the company may face if Trump follows up his words with action: