The US Treasury Department is on track to announce by the end of the year which woman will become the first on US paper currency in more than a century.
Treasury Secretary Jacob Lew set off a furore in June when he announced that he would replace the portrait of founding father Alexander Hamilton on the $US10 note with a woman.
He said a month later that Treasury had received more than 1.5 million responses commenting on the change, including everything from tweets to handwritten letters.
Treasury officials are not saying which famous women are in the running to be placed on the $US10 note, but one senior official said on Friday that many of the letters have included passionate arguments.
The official said that Treasury had gotten comments in support of a number of women who have played an important role in US history, going back to the founding of the country, ranging through the Civil War and up to the modern era.
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The $US10 note currently features the US Treasury Department on one side and Hamilton, the country's first treasury secretary, on the other.
Lew said in June that the goal is to announce which woman will go on the $US10 note by the end of this year with the total redesign completed by 2020, the 100th anniversary of the passage of the 19th Amendment giving women the right to vote.
