The dollar's global financial dominance, a decades-long self-reinforcing pillar, is being tested by the Trump administration's policies. While historically considered a theoretical curiosity, the administration's approach to international relations and trade is prompting questions about the currency's preeminence. The US benefits from dollar dominance through financial control and lower borrowing costs, but faces costs like an overvalued currency impacting manufacturers. The White House reportedly seeks to retain benefits while mitigating costs, potentially through trade barriers and financial interventions.