Europe is forging ahead with its crackdown on Big Tech, levying fines on Alphabet’s Google and Elon Musk’s X and opening new investigations, asserting its sovereign right to enforce its laws in defiance of U.S. President Donald Trump.

Three months after hitting Google with an unexpectedly high 2.95 billion euro ($3.44 billion) fine, the European Commission on Friday imposed a 120 million euro penalty on Elon Musk’s X for breaching European Union online content rules.

The U.S. government has pushed back, linking reductions in U.S. steel import tariffs to weaker EU digital rules and ordering its diplomats to launch a lobbying blitz against the laws.

At issue are the EU’s Digital Markets Act, which seeks to rein in the power of Amazon, Apple, Google, Meta Platforms and Microsoft as well as Booking.com and ByteDance, and the Digital Services Act, which forces large online platforms to do more to tackle illegal and harmful content.

EU antitrust chief Teresa Ribera has flatly rejected U.S. criticism.

“It is our duty to remind others that we deserve respect. I don’t enter into how they regulate the health standards in the U.S. market. But I am in charge of deffinishing the well-functioning digital markets in Europe and it is not related at all with any type of joint conversation,” she informed one event.