US Department of Justice refuses to assist France's investigation into Elon Musk's X platform following Paris office raid, creating a transatlantic law enforcement rupture with direct implications for EU digital regulation enforcement

The US Department of Justice (DOJ) has formally refused to assist French law enforcement with its investigation into Elon Musk's social media platform X, following a raid on X's Paris office earlier in 2026. The refusal was communicated via a letter from the DOJ's Office of International Affairs — the division responsible for handling mutual legal assistance treaty (MLAT) requests from foreign governments. MLATs (mutual legal assistance treaties — bilateral or multilateral agreements under which countries agree to share evidence and cooperate in criminal investigations) are the primary mechanism through which EU member states obtain US cooperation in cross-border digital investigations. The DOJ's refusal to assist France is therefore a structural break: it signals that the current US administration is unwilling to facilitate European regulatory or criminal scrutiny of US technology platforms, even where the platform operates physical offices and employs staff within EU jurisdiction. For the European Commission and EU member states, the refusal creates an enforcement gap. French regulators and prosecutors investigating potential violations of EU platform law — including the Digital Services Act (DSA), which imposes systemic risk obligations on very large online platforms — depend on US cooperation to access data held on US servers. A US refusal to cooperate makes it practically difficult to gather evidence held outside EU territorial jurisdiction. The incident also has implications for the enforcement architecture: the Commission retains direct supervisory authority over very large platforms regardless of member state cooperation, but evidence-gathering limitations affect the breadth of any investigation. X was previously put on notice by the Commission regarding DSA compliance obligations.