U.S. dollar banknotes.

The dollar fell from a one-week high on Wednesday, as political squabbling over a stimulus package for the U.S. economy halted its recent rebound.

The greenback, however, rose to a three-week peak against the yen, climbing for a fourth straight session. The dollar/yen pair typically moves in tandem with U.S. Treasury yields, with the 10-year advancing to a one-month high earlier in the session.