“The buck stops here,” a phrase used by President Harry Truman to illustrate his willingness to take responsibility, could also have been used as the official U.S. government position on the dollar itself. A strong greenback, which supports the stability of U.S. assets, the probity of its debt, and the nation’s broader standing among its global peers has been the bedrock of American policy for decades. “I think it’s great,” President Donald Trump told reporters in Iowa Tuesday when asked about the dollar’s recent slump, which has dragged the greenback to a fresh four-year low amid the worst monthly decline since last April’s “Liberation Day” tariff turmoil.