Yields on U.S. government debt held to a tight range overnight and into Monday morning, despite President Donald Trump’s plan to impose 25% tariffs on imports of steel and aluminum.Yields on U.S. government debt held to a tight range overnight and into Monday morning, despite President Donald Trump’s plan to impose 25% tariffs on imports of steel and aluminum. Yields on U.S. government debt held to a tight range overnight and into Monday morning, despite President Donald Trump’s plan to impose 25% tariffs on imports of steel and aluminum.