Among the threats tariffs pose to the U.S. economy, none may be as strange as the sell-off in the dollar. Currencies rise and fall all the time over inflation fears and other factors, but economists worry the dramatic dollar drop shows a loss of confidence in the U.S. as President Donald Trump tries to reshape global trade. If true, the blow could be big. The special status of the dollar as the medium of international trade and a safe haven has allowed the U.S. government, consumers and businesses to borrow at low rates even as debts have ballooned, which has helped speed economic growth.

The euro is hovering close to parity with the dollar, falling to its lowest level in 20 years and even briefly touching a one-to-one exchange …

WASHINGTON (AP) — The U.S. dollar has been surging so much that it's nearly equal in value to the euro for the first time in 20 years. That tr…