The dollar fell against a basket of other major currencies on Friday, as Treasury yields slipped and investors remained skeptical of U.S. Republicans' efforts to pass tax cuts after a barren first year for the Trump administration in Congress.
The dollar index, which measures the greenback against six rival currencies, was down 0.28 percent to 93.67. For the week, the index was down 0.8 percent.
The euro was up 0.20 percent to $1.1793. The greenback was down 0.87 percent against the Japanese yen.
"The dollar is weaker across the board, especially against the yen, but also against most of the emerging market currencies," said Win Thin, head of emerging markets currency strategy at Brown Brothers Harriman in New York.
"I think part of it is just lower rates," he said.
U.S. Treasury yields edged lower on Friday, in line with falls on Wall Street as investors weighed the fate of the Republicans' tax cut plan.
Congressional Republicans took important steps on Thursday toward the biggest U.S. tax code overhaul since the 1980s, with the House of Representatives approving a broad package of tax cuts and a Senate panel advancing its own version of the legislation sought by senior lawmakers and President Donald Trump.
The House vote shifted the tax debate to the Senate, where a tax-writing panel finished debating and approved a bill late on Thursday. That measure has already encountered resistance from some within the Republican ranks.
Full Senate action is expected after next week's Thanksgiving holiday.