On the heels of yet another year of record sales, Amazon is dealing with a couple of unwelcome updates in the new year. The Senate Judiciary Committee has announced it will soon be marking up the American Innovation and Choice Online Act, an antitrust bill targeting Amazon and other Big Tech companies. This follows reports that the Federal Trade Commission is ramping up its years-long antitrust investigation into Amazon’s cloud computing arm, Amazon Web Services, or AWS.

It’s clearer now than ever that Amazon, which was allowed to grow mostly unhindered for more than two decades, is caught in the middle of an international effort to check Big Tech’s power.

The Senate bill, one of several bipartisan antitrust bills in Congress, would prohibit Amazon from giving its products preferential treatment, among other things. It’s the bill that would affect the company the most, and the one it has been fighting hardest against. Meanwhile, the renewed scrutiny from the FTC about alleged anti-competitive behavior from AWS, which represents a significant and largely invisible source of Amazon’s profits, could threaten Amazon’s long-term dominance in a number of industries.

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Sarah Miller, executive director of the American Economic Liberties Project, an anti-monopoly advocacy group, sees it differently: “Amazon leverages its power in one space to take over a new space, which is core to their business practice. They have the ability to combine the competitive advantages of different aspects of their business to take over new sectors of the economy.”

While the FTC, for now, seems interested in AWS (and Amazon’s attempt to buy MGM), most of the antitrust attention we’ve seen elsewhere is focused on Amazon’s retail business and how it treats the businesses that sell products through its Marketplace platform. Critics say Amazon uses its power to give its own wares an unfair advantage over third-party sellers, and effectively forces them to pay for extra services and make agreements that could inflate prices everywhere.

“That’s where there’s a lot of obvious harms, and where you have businesses who are unhappy with how they’re being treated,” Miller said.