The U.S. National Association of Manufacturers has urged President George W. Bush to address the strong dollar, fueling speculation over a shift in the U.S. foreign-exchange policy.

Noted U.S. economists, too, have voiced skepticism about the U.S. policy, calling for measures to drive down the dollar's value and cut the bloated U.S. trade deficit.

Officials at the Treasury Department and the White House remain unmoved, however, reiterating that the United States remains committed to a strong-dollar policy.