As the first president of the United States ... each bill, or certificate, was a federal government’s promise that its holder could exchange it for its equal value of silver dollars.

The U.S. dollar edged lower on Tuesday as President Donald Trump's tariff threats were interpreted more as a negotiating ...

US President Donald Trump ... and be interchangeable with physical dollars, giving the US central bank control over the supply of the virtual currency, and guaranteeing its value.