The dollar dropped on Wednesday as Democrat Doug Jones defeated Republican Roy Moore in Alabama’s Senate race.
The dollar index slipped 0.2 percent to 93.948 .DXY retreating from three-week top scaled on Tuesday.
The greenback fell 0.3 percent to 113.26 yen, while the euro ticked up 0.1 percent to $1.1758.
Bitcoin lost 1.1 percent on the Bitstamp exchange at $16,465.09.
The Fed is expected to raise its benchmark rate to between 1.25 and 1.50 percent, with traders also focusing on clues to the monetary policy for next year.