A rollback by US President Donald Trump threatens the legality of transatlantic data flows, according to privacy group NOYB. If Democrats resign from the US Privacy and Civil Liberties Oversight Board, it could hinder the agency's operations and affect the EU's reliance on US data protection. Trump's recent Executive Order may lead to a review of national security decisions that underpin EU-US data transfers, potentially forcing the EU to annul existing agreements. The EU's highest court has previously invalidated data transfer frameworks due to US surveillance laws.