The dollar fell on Monday after gaining gains over three weeks as investors sold for profit ahead of mid-term elections in the United States this week, which could trigger a new wave of turmoil in global markets.
The dollar index fell 0.1 percent to 96.39 and touched last week's highest since June 2017 at 97.20.
Investors are waiting for the mid-term congressional elections, which are on Tuesday, and expectations are a big chance for Democrats to control the House of Representatives, while Republicans are likely to retain control of the Senate.
The single currency fell 0.1 percent to $ 1.1378.
The pound rose 0.3 percent to a 10-day high against the dollar at $ 1.3065 after a report by The Sunday Times that a UK customs agreement was being drafted into the EU's withdrawal agreement.
Prime Minister Teresa Mae's office described the report as purely speculation.
Against the euro, sterling rose to 87.33 pence, the highest since October 11.
