Trade tensions between Washington and Brussels have escalated sharply. Just one day after the ratification of the Turnberry trade deal, which capped most European export tariffs at 15%, President Donald Trump issued an ultimatum on Truth Social: any nation imposing a Digital Services Tax (DST) on US tech firms will face a 100% tariff on all goods sent to the United States.

Trump asserted that these tariffs would supersede any existing trade agreements, whether signed or implemented. The move is a direct defense of US tech giants like Google, Amazon, Meta, and Apple, which the administration claims are unfairly targeted by European nations despite booking vast sales in those markets.

Brussels Stands Firm on Fiscal Sovereignty

Unlike previous diplomatic skirmishes, the European Union's response has been unusually resolute. The European Commission described taxation as a "sovereign right," arguing that DSTs are non-discriminatory by design and apply to all large companies regardless of origin. As reported by Bloomberg, the EU warned it would respond "swiftly and decisively" if pushed, while still advocating for a global framework to tax the digital economy.

Legal Hurdles and Strategic Risks

Despite the bold rhetoric, Trump's ability to unilaterally impose such tariffs is under scrutiny. According to TNW, the US Supreme Court recently struck down "reciprocal" tariffs, ruling that the president cannot impose them solely on his own authority. This leaves it unclear which legal mechanism would allow for a sweeping 100% levy without Congressional approval.

A Pattern of Pressure

The tactic has seen success before; Canada scrapped its digital tax last year under similar pressure. Trump also recently targeted French wines with potential levies to force Paris's hand. However, a full-scale trade war would likely damage both economies, impacting hardware and software sectors alike. The outcome depends on whether the EU's commitment to digital sovereignty—exemplified by the Digital Markets Act—outweighs the economic risk of US tariffs.