U.S. President Donald Trump warned that any erosion of the dollar’s role as the world’s predominant reserve currency would have grave consequences for the United States, likening such a loss to “losing a war.” Speaking on Tuesday, Trump added that nations or actors seeking to displace the greenback would “pay a price.” Trump’s comments underscore growing policy concern in Washington over accelerating efforts by several countries to conduct trade and build reserves in alternative currencies, potentially diluting the dollar’s dominance in global finance and raising borrowing costs for the United States.